Musannaf Ibn Abi Shayba 3:4773

7150. Abdullah ibn Idris narrated to us, from Yahya ibn Sa'id, from Muhammad ibn Yahya ibn Habban, who said: The Messenger of Allah (ﷺ) said: "I have become heavy, so do not hasten before me in bowing nor in prostration. For whatever I precede you with when I bow, you will catch up with me when I rise; and whatever I precede you with when I prostrate, you will catch up with me when I place [my head down]."