‏الصلاة : Hadeeth No:860 Abu Huraira reported: The Messenger of Allaah (sallAllaahu alayhi wa sallam) said: Does the man who lifts his head before the Imam not fear that Allaah may change his face into that of an ass?...

‏الصلاة : Hadeeth No:1274 Abu Bakr b Abu Shaiban and Yahya b Abu Bukair both of them narrated this hadith with the same chain of transmitters....