When ‘Abd Allah b. ‘Umar began his prayer, he raised his hands opposite to his shoulders; and when he raised his head after bowing, he raised them lower than that.

Abu Dawud said: So as far as I know, no one narrated the words “he raised them lower that that” except Malik.
Sunan Abi Dawud Book 2, Hadith 352
← Previous Hadith “Allah listens to him who praises Him,” (he raised his hands); and when he stood up at the end of two rak’ahs, he raised his hands. He (Ibn ‘Umar) traced that back to the Messenger of Allah (ﷺ).

Abu Dawud said: What is correct is that the tradition reported by Ibn ‘Umar does not go back to the Prophet (may peace beupon him). Abu Dawud said: The narrator Baqiyyah reported the first part of this tradition from ‘Ubaid Allah and traced it back to the Prophet (ﷺ); and the narrator al-Thaqafi reported it from ‘Ubaid Allah as a statement of Ibn ‘Umar himself(not from the Porphet). In this version he said: When he stood at the end of two rak’ahs he raised them up to his breasts. And this is the correct version.

Abu Dawud said: This tradition has been transmitted as a statement of Ibn ‘Umar (and not of the Prophet) by al-Laith b. Sa’d, Malik, Ayyub, and Ibn Juraij; and this has been narrated as a statement of the Prophet (ﷺ) by Hammad b. Salamah alone on the authority of Ayyub. Ayyub and Malik did not mention his raising of hands when he stood after two prostrations, but al-Laith mentioned it in his version. Ibn Juraij said in this version: I asked Nafi’: Did Ibn ‘Umar raise (his hands) higher for the first time? He said: No, I said: Point out to me. He then pointed to the breasts or lower than that.

Sunan Abi Dawud Book 2, Hadith 351 Next Hadith → When the Messenger of Allah (ﷺ) stood at the end of two rak’ahs, he uttered the takbir (Allah is most great) and raised his hands.

Sunan Abi Dawud Book 2, Hadith 353