Abu Dawud said: What is correct is that the tradition reported by Ibn ‘Umar is a statement of Ibn ‘Umar and is not Marfu' (does not go back to the Prophet).
Abu Dawud said: Baqiyyah reported the beginning of it from ‘Ubaid Allah and traced it back [to the Prophet], while al-Thaqafi reported it from ‘Ubaid Allah as a statement stopping at Ibn ‘Umar, and said in it: And when he stood from the two rak'ahs, he raised them to his two breasts, and this is the correct version.
Abu Dawud said: Al-Laith ibn Sa'd, Malik, Ayyub, and Ibn Juraij narrated it as a statement stopping at the Companion (Mawquf), and Hammad ibn Salamah alone traced it back to the Prophet on the authority of Ayyub. Ayyub and Malik did not mention the raising [of hands] when standing from the two prostrations, but al-Laith mentioned it in his hadith. Ibn Juraij said in it: I asked Nafi': Did Ibn 'Umar make the first one the highest of them? He said: No, they are equal. I said: Point out to me. So he pointed to the two breasts or lower than that.