Sahih Muslim Book 4, Hadith Number 1850.

Chapter : Observing of silence in sermon on Friday.

Abu Huraira reported Abu’l-Qasim (the kunya of the Holy Prophet) (may peace be upon him) as saying: There is a time on Friday at which no Muslim would stand and pray and beg Allah for what Is good but He would give it to him; and he pointed with his hand that (this time) is short and narrow.