Sayyiduna Malik bin al-Huwayrith (may Allah be pleased with him) said: I saw the Prophet (peace and blessings be upon him) raise both his hands until they were level with the tops of his ears. Yazid bin Zuray' added: "And likewise when he bowed, and likewise when he raised his head from bowing."
Hadith Referenceالمعجم الكبير للطبراني / باب الميم / 16679