Sunan At-Tirmidhi

Amr bin Amir Al-Ansari narrated that he heard Anas bin Malik saying:""The Prophet would perform Wudu for every Salat."" I said, ""So what about you, what would you do?"" He said I wouId pray all of the prayers with one Wudu, as long as we had not committed Hadath (anything that invalidates Wudu)