Sayyiduna Abdul Rahman bin Awf (may Allah be pleased with him) narrates: The Prophet (peace and blessings be upon him) went out, heading toward his upper room. He entered it, faced the qiblah and went into prostration. He prolonged the prostration so much that I thought Allah Almighty had taken his soul during the prostration. I came near him, and he raised his head and asked: "Who is it?" I said: "Abdul Rahman." He asked: "What is the matter with you?" I said: "O Messenger of Allah, you made such a prostration that I feared that Allah Almighty might have taken your soul during this prostration." The Prophet (peace and blessings be upon him) said: "Jibril came to me and gave me glad tidings, and told me: 'Allah Almighty says: Whoever sends blessings (durud) upon you, I will send down mercy upon him; and whoever sends salam upon you, I will send down peace upon him.' So I made this prostration to give thanks to Allah Almighty."
Ahmad recorded it, and its narrators are thiqat (trustworthy).
Hadith Takhrij«المستدرك على الصحيحين للحاكم، ومن كتاب الإمامة ، وأما حديث عبد الوباب 756 السنن الكبرى للبيهقى ، كتاب الصلاة ، جماع أبواب سجود السهو وسجود الشكر ، باب سجود الشكر ، 3669 مسند أحمد بن حنبل، مسند العشرة المبشرين بالجنة ، مسند باقى العشرة المبشرين بالجنة ، مسند عبد الرحمن بن عوف الزبرى رضى الله عنه، 1617 مسند أبى يعلى الموصلى ، من مسند عبد الرحمن بن عوف، 813 ، أخرجه مسند أحمد برقم: 1667»