Riyad as-Salihin, Book 9, Hadith 1142 (In-Book) ⓘ

Umm Hani, daughter of Abu Talib (May Allah be pleased with her) reported: I went to the Messenger of Allah on the day of the conquest of Makkah. He was taking a bath at that time. When he finished the bath, he performed eight Rak'ah (of optional) prayers. This was during the Duha (forenoon).[Al-Bukhari and Muslim].

وعن أم هانئ فاختة بنت أبي طالب رضي الله عنها قالت‏:‏ ذهبت إلى رسول الله صلى الله عليه وسلم عام الفتح فوجدته يغتسل فلما فرغ من غسله صلى ثمان ركعات، وذلك ضحى‏"‏ ‏(‏‏(‏متفق عليه وهذا مختصر لفظ إحدى روايات مسلم‏)‏‏)‏