Sahih Muslim
The Book Pertaining to the Remembrance of Allah, Supplication, Repentance and Seeking Forgiveness (Kitab Al-Dhikr)
Book Number: 035 / Hadith Number: 6531
Abu Musa, reported. We were along with Allah's Messenger (may peace be upon him) in an expedition. The rest of the hadith is the same (and there is an addi- tion of these words in that):" He (the Holy Prophet) said: He Whom you are sup- plicating is nearer to every one of you than the neck of his camel." And there is no mention of these words:" There is no might and no power but that of Allah."