Sayyidah Umm Hani (may Allah be pleased with her) said: "The Messenger of Allah (peace and blessings be upon him) came to me on the day of the Conquest of Makkah and took a bath, then he prayed eight rak'ahs which he had never prayed before that day, nor after it."
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 21371