Genesis 50:16-18

So they sent Joseph a message, “Before his death, your father gave this command: Tell Joseph, ‘Forgive your brothers’ sin—all that wrongdoing. They did treat you very badly.’ Will you do it? Will you forgive the sins of the servants of your father’s God?” When Joseph received their message, he wept. Then the brothers went in person to him, threw themselves on the ground before him and said, “We’ll be your slaves.”