Sahih Muslim Book 4, Hadith Number 853.

Chapter : If something happens in prayers, men should glorify Allah and women should clap hands.

Abu Huraira reported: one day the Messenger of Allah (may peace be upon him) led the prayer. Then turning (towards his Companions) he said: O you, the man, why don’t you say your prayer well? Does the observer of prayer not see how he is performing the prayer for he performs it for himself? By Allah, I see behind me as I see In front of me.