A kid of the goats. — Heb., a full grown he-goat. Maimonides thinks that the reason why he-goats were so often used as sin-offerings under the Levitical law was to remind the Israelites of this great sin committed by their patriarchs.
Related Commentaries of Genesis 37:31
Genesis 37:31
31 And they took Joseph's coat, and killed a kid of the goats, and dipped the coat in the blood;