I never saw the Messenger of Allah ﷺ pray the Duha prayer except once.
حدثنا وكيع عن سفيان عن عاصم بن كليب عن أبيه
ما رأيت رسول الله ﷺ صلى الضحى إلا مرة
No references are available.
Its isnad is sahih. It has occurred previously at 9720, and will come again at 23907. Asim bin Kulayb is saduq but was accused of holding the doctrine of Irjaa, and his father Kulayb bin Shihab is also saduq, and he is among the Tabiin.10152m - Waki narrated to us, he said, Dawud Zaafari narrated to us from his father, from Abu Hurairah, who said, the Messenger of Allah ﷺ said, "The poisoned sickness is intercession." Daif.(10152m) Its isnad is daif. It contains Dawud Zaafari, that is, Dawud bin Yazid Awdi. It is sahih with other wordings through other routes. See 9696, the same route, and the discussion of its meaning there.The hadith with this wording was narrated by Abu Hanifa (1/148), Bayhaqi in Shuab (1/281, no. 299), and Abu Naeem in Hilya (8/272).