Sunan Abi Dawud Book 2, Hadith 362
I saw that the Messenger of Allah (ﷺ) raised his hands when he began prayer, but he did not raise them until he finished (prayer).
Abu Dawud said: This tradition is not sound.
The words “then he did not repeat“ were narrated to us later on at Kufah by him (Yazid).
Abu Dawud said: This tradition has also been transmitted by Hushaim, Khalid, and Ibn Idris from Yazid. They did not mention the words “then he did not repeat”
When the Messenger of Allah (ﷺ) began his prayer, he raised his hands extensively.