Musnad Ahmad 5279 — Musnad of Abdullah ibn Umar ibn al-Khattab

It is narrated from Sayyiduna Ibn Umar (may Allah be pleased with them both) that the Prophet (peace and blessings be upon him) used to raise his hands to the level of his shoulders at the beginning of the prayer, and he would also raise his hands when going into bowing (ruku‘) and after raising his head from bowing, but between the two prostrations the Prophet (peace and blessings be upon him) did not raise his hands.