Musannaf Ibn Abi Shayba 13:1662

Abu Bakr narrated to us, he said: Ali bin Mushir narrated to us, he said: Abu Hayyan informed us, from Abu al-Furat, from Abu Dawud, who said: I was beneath the pulpit of Hudhayfah while he was in al-Mada'in. He praised Allah and extolled Him, then said: "As for what follows: Indeed, the seller of wine and its drinker are equal in sin. Indeed, the keeper of swine and its eater are equal in sin."