Musannaf Ibn Abi Shayba 3:50

Ibn Numayr narrated to us, from Ibn Abi ‘Arubah, from Nasr ibn ‘Asim, from Malik ibn al-Huwayrith, who said: I saw the Prophet, may Allah bless him and grant him peace, saying the takbir and raising his hands when he bowed and when he raised his head from bowing, until he aligned them with the lobes of his ears.