Musnad Ahmad 833:7

'Abd al-Samad and Abu 'Amir narrated to us, they said: Hisham narrated to us, from Qatadah, from Nasr ibn 'Asim, from Malik ibn al-Huwayrith: "That the Messenger of Allah (peace and blessings of Allah be upon him), when he said the takbir, would raise his hands until he placed them near his ears. And when he bowed, he would do the same. And when he raised his head from bowing, he would do the same."