Sunan Abi Dawud 327
سنن أبي داود#327SahihAmmar b. Yasir said:I asked the Prophet (ﷺ) about tayammum. He commanded me to strike only one stroke (i.e. the strike the ground) for (wiping) the face and the hands
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
Zubair Ali ZaiHasan
In-book reference: 1:327