The Book of Prayers (Kitab Al-Salat)
Muslim :: Book 4 : Hadith 1895
Umara b. Ruwaiba said he saw Bishr b. Marwan on the pulpit raising his hands and said: Allah, disfigure these hands! I have seen Allah's Messenger (may peace be upon him) gesture no more than this with his hands, and he pointed with his forefinger.