´Sulaiman bin Buraidah narrated from his father that:` The Prophet used to perform ablution for every prayer, but on the day of the conquest of Makkah, he performed all of the prayers with one ablution.
Hadith ReferenceSunan Ibn Majah / The Book of Purification and its Sunnah / Hadith: 510
Hadith Gradingالألبانی:صحيح | زبیر علی زئی:صحيح مسلم