'Forgive' in the Bible

There are perhaps fifty righteous within the city: wilt thou also destroy and not forgive the place for the sake of the fifty righteous that are therein?

And Jehovah said, If I find at Sodom fifty righteous within the city, then I will forgive all the place for their sakes.

Thus shall ye speak to Joseph: Oh forgive, I pray thee, the transgression of thy brethren, and their sin! for they did evil to thee. And now, we pray thee, forgive the transgression of the servants of the God of thy father. And Joseph wept when they spoke to him.