Musannaf Ibn Abi Shaybah

It is narrated from Hazrat Abu Ma'mar that he said: We were sitting with Hazrat Amr bin Shurahbil when he said: Go with us to that person among the people who most closely resembles Hazrat Abdullah in way of life, manner of speech, and conduct, and who is the greatest confidant of Hazrat Abdullah. We did not know who he was until we reached Hazrat Alqamah.