Musnad Ahmad 435:65

Sufyan narrated to us, from Ibn ‘Ajlan, from Muhammad ibn Yahya ibn Hibban, from Ibn Muhayriz, from Mu’awiyah, who said: The Messenger of Allah (ﷺ) said: "Do not hasten before me in bowing (ruku’) and prostration (sujud), for I have become heavy. Whatever I precede you in when I bow, you will catch up with me when I rise; and whatever I precede you in when I prostrate, you will catch up with me when I rise."