Sahih Muslim Book 6, Hadith Number 2425.

This Hadith has been narrated on the authority of Ibn Abi Aufa (Allah be pleased with him) through another chain of transmitters (but with a sight alteration of words): In this Hadith transmitted by one of the narrators (neither these words are found): During the month of Ramadan.” nor his statement: “And the night prevails from that side (the eastern side).” (These words are found in the narration of)Hushaim only.