Musannaf Ibn Abi Shayba 7:133

12277. 'Abd al-A'la narrated to us, from Hisham, from al-Hasan, from 'Abd al-Rahman ibn Samurah, who said: The Messenger of Allah (may Allah bless him and grant him peace) said: "Do not swear by your fathers, and do not swear by the idols (al-tawaghit)."