Abdullah bin Harith bin Nawfal reported,

I asked and did my utmost to find someone who could tell me that the Messenger of Allah ﷺ had prayed the Duha prayer, but I found no one who would report that to me, except that Umm Hani bint Abu Talib told me that on the day of the conquest the Messenger of Allah ﷺ came after the day had risen high. A garment was brought and held up as a screen for him, and he bathed. Then he stood and prayed eight units. I could not tell whether his standing in them was longer, or his bowing, or his prostration, for all of it was close to equal. She said, "I never saw him pray it before that or after it."Muradi, reporting from Yunus, did not say, "He informed me."

Muslim 1668

Sahih

و حدثني حرملة بن يحيى ومحمد بن سلمة المرادي قالا أخبرنا عبد الله بن وهب أخبرني يونس عن ابن شهاب قال حدثني ابن عبد الله بن الحارث أن

أباه عبد الله بن الحارث بن نوفل قال

سألت وحرصت على أن أجد أحدا من الناس يخبرني أن رسول الله ﷺ سبح سبحة الضحى فلم أجد أحدا يحدثني ذلك غير أن أم هانئ بنت أبي طالب أخبرتني أن رسول الله ﷺ أتى بعد ما ارتفع النهار يوم الفتح فأتي بثوب فستر عليه فاغتسل ثم قام فركع ثماني ركعات لا أدري أقيامه فيها أطول أم ركوعه أم سجوده كل ذلك منه متقارب قالت فلم أره سبحها قبل ولا بعد قال المرادي عن يونس ولم يقل أخبرني

مسلم 1668صحيح
Contents
Reference
Commentary
Ayat
Collection
Sahih Muslim
Book
Travelers' prayer and its shortening
Chapter
Recommendation of Duha prayer, that its minimum is two rakahs and its most complete is eight rakahs and its middle is four or six rakahs, and the encouragement to maintain it
Numbering
Darussalam 1668
Muslim 1668