Musannaf Ibn Abi Shayba 28:878

Waki’ narrated to us, from Sufyan, from Alqamah ibn Marthad, from Sulayman ibn Buraydah, from his father, that the Prophet, peace and blessings of Allah be upon him, when he would send a commander over an army or a detachment, he would advise him, saying: "If you besiege the people of a fortress and they want you to grant them the covenant of Allah and the covenant of His Messenger, do not grant them the covenant of Allah nor the covenant of His Messenger. Rather, grant them your own covenant and the covenant of your fathers. For if you violate your own covenants and the covenants of your fathers, it is less serious than if you were to violate the covenant of Allah and the covenant of His Messenger, peace and blessings of Allah be upon him." Sufyan said: Alqamah said: I narrated the hadith of Sulayman ibn Buraydah to Muqatil ibn Hayyan. Muqatil ibn Hayyan said: Muslim ibn Haytham al-Abdi narrated to us, from al-Nu’man ibn Muqarrin al-Muzani, from the Prophet, peace and blessings of Allah be upon him, the like of it.