Genesis 37:29-32

29When Reuben returned to the cistern and saw that Joseph was not there, he tore his clothes.

30He went back to his brothers and said, “The boy isn’t there! Where can I turn now?” 31Then they got Joseph’s robe, slaughtered a goat and dipped the robe in the blood.

32They took the ornate robe back to their father and said, “We found this. Examine it to see whether it is your son’s robe.”