Musannaf Ibn Abi Shayba 19:270

Abu Bakr narrated to us, he said: Jarir narrated to us, from Mughira, from Hammad, from Ibrahim, who said: The prescribed punishment for the one who commits sodomy is the prescribed punishment for the adulterer. If he is a *muhsan* (previously married), then it is stoning, and if he is a virgin, then it is flogging.