Sunan Abi Dawud 1294
سنن أبي داود#1294SahihNarrated Simak:I asked Jabir b. Samurah: Did you sit in the company of the Messenger of Allah (ﷺ) ? He replied: Yes, very often. He would not stand from the place he prayed the dawn prayer till the sunrise. When the sun rose, he would stand (to pray Duha)
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniSahih
Muhammad Muhyi Al-Din Abdul HamidSahih
Shuaib Al ArnautHasan Sahih
Zubair Ali ZaiSahih Muslim (670)
In-book reference: 5:45