It is narrated from Sayyiduna Abu Rafi' (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Let me not find any one of you reclining on his couch, when a command of mine or something I have forbidden reaches him, saying: We do not know; we will only follow what we find in the Book of Allah."
Hadith Referenceالمعجم الكبير للطبراني / باب الألف / 930