Musannaf Ibn Abi Shayba 27:659

'Abd al-Rahim ibn Sulayman narrated to us, from Zakariyya ibn Abi Za'idah, from Abu Ishaq, from Silah ibn Zufar, from Hudhayfah, who said: The Bishop of Najran, al-'Aqib, and al-Sayyid came to the Prophet, may Allah bless him and grant him peace, and they said: "Send with us a man who is trustworthy, truly trustworthy." The companions of the Prophet, may Allah bless him and grant him peace, aspired to it. He said: "Stand up, O Abu 'Ubaydah ibn al-Jarrah."