Sunan Abi Dawud Book 2, Hadith 360
When the Messenger of Allah (ﷺ) began prayer, he raised his hands up to his ears, then he did not repeat.
He raised his hands once in the beginning. Some narrated: (raised his hands) once only.
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”