Deuteronomy 30:2,6-8
And shalt return unto the LORD thy God, and shalt obey his voice according to all that I command thee this day, thou and thy children, with all thine heart, and with all thy soul; …

Ezekiel 36:26,31
A new heart also will I give you, and a new spirit will I put within you: and I will take away the stony heart out of your flesh, and I will give you an heart of flesh…

Zechariah 12:10
And I will pour upon the house of David, and upon the inhabitants of Jerusalem, the spirit of grace and of supplications: and they shall look upon me whom they have pierced, and they shall mourn for him, as one mourneth for his only son, and shall be in bitterness for him, as one that is in bitterness for his firstborn.

I smote.

Ezekiel 21:12
Cry and howl, son of man: for it shall be upon my people, it shall be upon all the princes of Israel: terrors by reason of the sword shall be upon my people: smite therefore upon thy thigh.

Luke 18:13
And the publican, standing afar off, would not lift up so much as his eyes unto heaven, but smote upon his breast, saying, God be merciful to me a sinner.

2 Corinthians 7:10,11
For godly sorrow worketh repentance to salvation not to be repented of: but the sorrow of the world worketh death…

I was ashamed.

Jeremiah 3:25
We lie down in our shame, and our confusion covereth us: for we have sinned against the LORD our God, we and our fathers, from our youth even unto this day, and have not obeyed the voice of the LORD our God.

Leviticus 26:41,42
And that I also have walked contrary unto them, and have brought them into the land of their enemies; if then their uncircumcised hearts be humbled, and they then accept of the punishment of their iniquity: …

Ezra 9:6
And said, O my God, I am ashamed and blush to lift up my face to thee, my God: for our iniquities are increased over our head, and our trespass is grown up unto the heavens.

I did.

Jeremiah 3:25
We lie down in our shame, and our confusion covereth us: for we have sinned against the LORD our God, we and our fathers, from our youth even unto this day, and have not obeyed the voice of the LORD our God.

Jeremiah 22:21
I spake unto thee in thy prosperity; but thou saidst, I will not hear. This hath been thy manner from thy youth, that thou obeyedst not my voice.

Jeremiah 32:30
For the children of Israel and the children of Judah have only done evil before me from their youth: for the children of Israel have only provoked me to anger with the work of their hands, saith the LORD.

and after I was instructed,
Instruction here implies a process of learning and understanding God’s ways, often through discipline or correction. In the historical context, Israel's exile served as a period of instruction, teaching them the consequences of their disobedience. This aligns with Proverbs 3:11-12, which speaks of the Lord’s discipline as an act of love. The instruction is not merely academic but transformative, leading to a deeper relationship with God.

I struck my thigh in grief.
Striking the thigh is an expression of deep sorrow and regret, a cultural gesture of mourning and repentance in ancient Near Eastern societies. This physical act symbolizes the internal anguish and acknowledgment of wrongdoing. It is similar to the public displays of mourning seen in other parts of the Bible, such as tearing clothes or wearing sackcloth, as seen in Job 1:20 and Jonah 3:6.

I was ashamed and humiliated
Shame and humiliation are common responses to sin and its consequences. In the biblical context, these feelings are not just personal but communal, affecting the entire nation of Israel. The acknowledgment of shame is a step towards redemption, as it reflects a recognition of sin and a desire for reconciliation with God. This is echoed in Psalm 51, where David expresses deep remorse for his sins.

because I bore the disgrace of my youth.’
The disgrace of youth refers to the past sins and rebellious actions of Israel, often depicted as spiritual adultery or idolatry. This phrase highlights the long-lasting impact of sin and the need for genuine repentance. The historical context involves Israel’s repeated turning away from God to worship other deities, leading to their downfall and exile. This is reminiscent of Ezekiel 16, where Israel’s unfaithfulness is portrayed as a youthful indiscretion that brings shame. The acknowledgment of past disgrace is crucial for moving forward in God’s plan of restoration.

- Jeremiah is voicing Ephraim’s joy of finally turning back to the LORD. The word “returned” points to a literal, physical and spiritual coming home, just as foretold in Jeremiah 31:17, “Your children will return to their own land.”

- Scripture often links return with God’s initiative: Hosea 14:1-2 calls, “Return, O Israel, to the LORD your God,” while Luke 15:20 pictures the father running to the prodigal son. God’s faithfulness makes return possible.

- For every believer, turning back is not theoretical. It means abandoning the path that led away and planting both feet in the Father’s house again (Isaiah 55:7).

- Repentance follows the return. It is the heartfelt change of mind and life. Acts 3:19 urges, “Repent therefore, and turn back, that your sins may be wiped out.”

- True repentance embraces confession (Psalm 32:5) and a desire to walk in obedience (2 Corinthians 7:10-11).

- This repentance is not forced; it wells up because God’s kindness leads us to it (Romans 2:4).

- God does not leave His people in ignorance; instruction follows repentance. Isaiah 30:21 promises, “Your ears will hear this command behind you: ‘This is the way; walk in it.’”

- The law written on the heart (Jeremiah 31:33) illuminates the path.

- In the Christian life, the Spirit takes the role of Instructor, guiding into all truth (John 16:13).

- The gesture shows deep mourning and shock over sin’s ugliness. Similar expressions appear in Ezekiel 21:12, “Strike the thigh in grief,” depicting sudden realization of guilt.

- Godly sorrow produces repentance without regret (2 Corinthians 7:10). The outward action mirrors the inward pain of having offended a holy God.

- Such grief is not self-condemnation but a healthy recognition that sin matters (James 4:8-9).

- Shame is the natural response when holy light exposes former darkness (Psalm 34:5; Daniel 9:8).

- The LORD uses this moment to purify, not to paralyze. Romans 6:21 asks, “What fruit did you reap at that time from the things you are now ashamed of?” The contrast heightens gratitude for mercy.

- Knowing Christ bore our shame (Hebrews 12:2) lifts our heads while keeping our hearts humble.

- Israel’s earlier idolatries left scars (Jeremiah 3:24-25). Looking back, the nation sees the wasted years and feels their weight.

- Believers also recall “the former way of life” (Ephesians 4:22) and admit the disgrace, yet rejoice that “where sin increased, grace increased all the more” (Romans 5:20).

- Remembering past disgrace fuels present devotion, ensuring we never desire the chains again (Galatians 5:1).

Jeremiah 31:19 traces the journey of God’s people: returning, repenting, receiving instruction, grieving over sin, feeling rightful shame, and acknowledging past disgrace. Each step reveals a Father who calls, cleanses, teaches, and restores. The verse invites every believer to keep short accounts with God, welcome His correction, and rejoice that He turns our deepest shame into testimony of His unfailing grace.

"And then he groaned, and smote on both his thighs

With headlong hands, and so in sorrow spoke."

The reproach of my youth--i.e., the shame which the sins of his youth had brought upon him.