Sahih Muslim Book 4, Hadith Number 1857.

Chapter : There is a special (fortunate) time on Friday.

Abu Huraira reported the Apostle of Allah (may peace be upon him) as saying: The best day on which the sun has risen is Friday; on it Adam was created on it he was made to enter Paradise, on it he was expelled from it. And the last hour will take place on no day other than Friday.