Musannaf Ibn Abi Shayba 17:1389

Ali ibn Mushir narrated to us, from al-Ajalih, from Yazid ibn al-Asamm, from Ibn Abbas, who said: A man came to the Prophet, may Allah bless him and grant him peace, and spoke some words to him, saying: "Whatever Allah wills and you will." He (the Prophet) said: "Have you made me an equal to Allah? No, rather, whatever Allah wills alone."