Sunan Abi Dawud 943
سنن أبي داود#943SahihNarrated Anas ibn Malik: The Prophet (ﷺ) used to make a sign during prayer
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 ArnautSahih
Zubair Ali ZaiSahih
In-book reference: 2:554