Musannaf Ibn Abi Shayba 3:4147

Abu Mu'awiyah narrated to us, from al-A'mash, from Ibrahim, from Hammam, who said: Hudhayfah prayed upon a bench while they were below him. Salman pulled him until he brought him down. When he finished, he said to him: "Did you not know that your companions used to dislike for the Imam to pray upon something while they are below him?" Hudhayfah said: "Yes, I remembered when you pulled me."