Gen 37:32

“AND THEY SENT THE COAT OF MANY COLORS, AND THEY BROUGHT IT TO THEIR FATHER. I.e., by command., clearly indicates that they did not bring it themselves. Ramban answers that the second half of the verse means that they commanded others to bring the coat to their father. Perhaps the word vayavi’u (and they brought) refers to the messengers who brought the coat, for the brothers dispatched it when they were still in Dothan, and it was the messengers who said, This we have found; recognize now. It may be that they sent the coat to Hebron, to one of their homes, and when they arrived they brought it before their father, and said to him, This we have found. They did all of this in order to feign ignorance of the matter, for had they remained quiet, he would have suspected them, saying; “You killed him,” for he knew that they were jealous of him. And some scholars explain the word vayeshalchu — ordinarily translated as “and they sent” — to mean that they pierced the coat with a sword in order to tear it in many places, to give the appearance of having been torn by the teeth of animals. The word vayeshalchu would thus be derived from the verse, By the sword (‘b’shelach’) they shall perish. The significance of the word hapasim (many colors) is that they sent him the coat so that he might recognize it by the colors which he had made for him.”