This Bible contradiction is from the Skeptic's Annotated Bible.

Verses

God does not repent.

Numbers 23:19 View context

God [is] not a man, that he should lie; neither the son of man, that he should repent: hath he said, and shall he not do [it]? or hath he spoken, and shall he not make it good?

1 Samuel 15:29 View context

And also the Strength of Israel will not lie nor repent: for he [is] not a man, that he should repent.

Ezekiel 24:14 View context

I the LORD have spoken [it]: it shall come to pass, and I will do [it]; I will not go back, neither will I spare, neither will I repent; according to thy ways, and according to thy doings, shall they judge thee, saith the Lord GOD.

Malachi 3:6 View context

For I [am] the LORD, I change not; therefore ye sons of Jacob are not consumed.

James 1:17 View context

Every good gift and every perfect gift is from above, and cometh down from the Father of lights, with whom is no variableness, neither shadow of turning.

God repents.

Genesis 6:6 View context

And it repented the LORD that he had made man on the earth, and it grieved him at his heart.

Exodus 32:14 View context

And the LORD repented of the evil which he thought to do unto his people.

Deuteronomy 32:36 View context

For the LORD shall judge his people, and repent himself for his servants, when he seeth that [their] power is gone, and [there is] none shut up, or left.

1 Samuel 15:11 View context

It repenteth me that I have set up Saul [to be] king: for he is turned back from following me, and hath not performed my commandments. And it grieved Samuel; and he cried unto the LORD all night.

2 Samuel 24:16 View context

And when the angel stretched out his hand upon Jerusalem to destroy it, the LORD repented him of the evil, and said to the angel that destroyed the people, It is enough: stay now thine hand. And the angel of the LORD was by the threshingplace of Araunah the Jebusite.

1 Chronicles 21:15 View context

And God sent an angel unto Jerusalem to destroy it: and as he was destroying, the LORD beheld, and he repented him of the evil, and said to the angel that destroyed, It is enough, stay now thine hand. And the angel of the LORD stood by the threshingfloor of Ornan the Jebusite.

Isaiah 38:1-5 View context

In those days was Hezekiah sick unto death. And Isaiah the prophet the son of Amoz came unto him, and said unto him, Thus saith the LORD, Set thine house in order: for thou shalt die, and not live.

Then Hezekiah turned his face toward the wall, and prayed unto the LORD,

And said, Remember now, O LORD, I beseech thee, how I have walked before thee in truth and with a perfect heart, and have done [that which is] good in thy sight. And Hezekiah wept sore.

Then came the word of the LORD to Isaiah, saying,

Go, and say to Hezekiah, Thus saith the LORD, the God of David thy father, I have heard thy prayer, I have seen thy tears: behold, I will add unto thy days fifteen years.

Jeremiah 15:6 View context

Thou hast forsaken me, saith the LORD, thou art gone backward: therefore will I stretch out my hand against thee, and destroy thee; I am weary with repenting.

Amos 7:3 View context

The LORD repented for this: It shall not be, saith the LORD.

Jonah 3:10 View context

And God saw their works, that they turned from their evil way; and God repented of the evil, that he had said that he would do unto them; and he did [it] not.