'Forgiveness' in the Bible

Let me now have forgiveness for my sin this time only, and make prayer to the Lord your God that he will take away from me this death only.

And on the day after, Moses said to the people, Great has been your sin: but I will go up to the Lord, and see if I may get forgiveness for your sin.

But now, if you will give them forgiveness--but if not, let my name be taken out of your book.

And he said, If now I have grace in your eyes, let the Lord go among us, for this is a stiff-necked people, and give us forgiveness for our wrongdoing and our sin, and take us for your heritage.