Musannaf Ibn Abi Shayba 28:947

Isa ibn Yunus narrated to us, from al-Awza'i, who said: Ibn Suraqa narrated to me that Abu Ubaydah ibn al-Jarrah wrote to the people of Dayr Tabaya: "Upon you is the hosting of the guest for three days, and our protection is absolved from the harm of the army."