The Book Pertaining to the Merits of the Companions (Allah Be Pleased With Them) of the Holy Prophet (May Peace Be Upon Him) (Kitab Al-Fada'il Al-Sahabah)
Muslim :: Book 31 : Hadith 6006
Salman reported: In case it lies in your power don't be one to enter the bazar first and the last to get out of that because there is a bustle and the standard of Satan is set there. He said: I was informed that Gabriel (Allah be pleased with him) came to Allah's Apostle (may peace be upon him) and there was with him Umin Salama and he began to talk with him. He then stood up, whereupon Allah's Apostle (may peace be upon him) said to Umm Salama: (Do you know) who was he and what did he say? She said: He was Dihya (Kalbi). He reported Umm Salama having said: By Allah, I did not deem him but only he (Dihya) until I heard the address of Allah's Apostle (may peace be upon him) informing him about us. He (the narrator) said: I said to Uthman: From whom did you hear it? He said: From Usima b. Zaid.