Musannaf Ibn Abi Shaybah

Hazrat Hudhaifa (may Allah be pleased with him) narrates that two priests from Najran came to the Noble Prophet (peace and blessings be upon him), named Aqib and Sayyid. Both of them said: "Send with us a person who is completely trustworthy." So the companions of the Prophet (peace and blessings be upon him) began to desire this. The Prophet (peace and blessings be upon him) said: "O Abu Ubaidah! Stand up."