Sahih Muslim
The Book of Purification (Kitab Al-Taharah)
Book Number: 002 / Hadith Number: 435
Hammam b. Munabbih who is the brother of Wahb b. Munabbih. said: This is what has been transmitted to us by Abu Huraira from Muhammad, the Messenger of Allah (may peace be upon him) and then narrated a hadith out of them and observed that the Messenger of Allah (may peace be upon him) said: The prayer of none amongst you would be accepted in a state of impurity till he performs ablution.