Genesis 37:29-32

And Reuben returned unto the pit; and, behold, Joseph was not in the pit; and he rent his clothes. And he returned unto his brethren, and said, The child is not; and I, whither shall I go? And they took Joseph's coat, and killed a kid of the goats, and dipped the coat in the blood; and they sent the coat of many colours, and they brought it to their father; and said, This have we found: know now whether it be thy son's coat or no.