Abu Sa'id al-Khudri (may Allah be pleased with him) says that Hudhayfah bin al-Yaman (may Allah be pleased with him) led them in prayer in al-Mada'in on a raised place. Salman (may Allah be pleased with him) seized him from behind and said: I do not know whether a long time has passed for you or you have forgotten. Did you not hear the Prophet (peace and blessings be upon him) say: "The imam should not lead his companions in prayer from a place higher than theirs."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 5234