Genesis 50:15-18

And when Joseph's brethren saw that their father was dead, they said, Joseph will peradventure hate us, and will certainly requite us all the evil which we did unto him. And they sent a messenger unto Joseph, saying, Thy father did command before he died, saying, So shall ye say unto Joseph, Forgive, I pray thee now, the trespass of thy brethren, and their sin; for they did unto thee evil: and now, we pray thee, forgive the trespass of the servants of the God of thy father. And Joseph wept when they spake unto him. And his brethren also went and fell down before his face; and they said, Behold, we be thy servants.