Bible Verses About Repentance: Condition of God's favor

Until they confess their iniquities, and the iniquities of their ancestors, whereby they have transgressed against me, and walked contrary unto me.

Therefore I also will walk against them, and bring them into their enemies' land until their uncircumcised mind be ashamed. Then shall they pray for their sins.

And I will remember my covenant, that I made with Jacob, and Isaac, and Abraham. I will remember also the land:

And my people, upon whom my name is called, being converted, shall make supplication to me, and seek out my face, and do penance for their most wicked ways: then will I hear from heaven, and will forgive their sins and will heal their land.