´It was narrated that Anas bin Malik said:` "The Messenger of Allah used to perform ablution for every prayer, and we used to perform all of the prayers with one ablution."
Hadith Referenceسنن ابن ماجه / كتاب الطهارة وسننها / 509
Hadith Gradingالألبانی:صحيح | زبیر علی زئی:صحيح بخاري