Musnad Abi Ya'la 858 — five or four of us from among the Companions

It is narrated from Sayyiduna Abdul Rahman bin Awf (may Allah be pleased with him); he said that five or four of us from among the Companions of the Prophet (peace and blessings be upon him) would not leave him (peace and blessings be upon him), night and day, because of the needs that arose for him (peace and blessings be upon him). Once I came to him (peace and blessings be upon him) and he (peace and blessings be upon him) had already gone out. I followed him (peace and blessings be upon him), and he (peace and blessings be upon him) entered one of the gardens of al-Aswaf, prayed and prostrated, and made the prostration very long. I said (to myself): "Allah has taken his (peace and blessings be upon him) soul." Then he (peace and blessings be upon him) raised his head, called me and said: "What is the matter with you?" I said: "O Messenger of Allah! You made the prostration very long, so I said that Allah had taken the soul of His Messenger and I would never see you again." He (peace and blessings be upon him) said: "I prostrated in gratitude to my Lord for the favour He has granted me concerning my Ummah: whoever from my Ummah sends one salutation (durud) upon me, ten good deeds will be written for him and ten sins will be erased from him."