Jibrīl (peace be upon him) came to me and gave me glad tidings saying: “Allah, the Almighty, says: ’Whoever sends blessings on you, I will send blessings on him, and whoever sends greetings of peace to you, I will send greetings of peace to him.'" So I prostrated in thankfulness to Allah

‘Abdur-Rahmān ibn ‘Awf (may Allah be pleased with him) reported: The Messenger of Allah (may Allah's peace and blessings be upon him) set out heading to a place that he had given in charity. He entered it, faced the Qiblah, and fell to the ground in prostration. He remained prostrating for a long time, until I thought that Allah, the Almighty, had taken his soul in this prostration. So I got closer to him and sat. When he raised his head, he said: "Who is that?" I said: "‘Abdur-Rahmān." He said: "What do you want?" I said: "O Messenger of Allah, you prostrated for such a long time that I feared that Allah, the Exalted, had taken your soul." So he said: "Jibrīl (peace be upon him) came to me and gave me glad tidings saying: “Allah, the Almighty, says: ’Whoever sends blessings on you, I will send blessings on him, and whoever sends greetings of peace to you, I will send greetings of peace to him.' So I prostrated in thankfulness to Allah."