Hazrat Abu Musa Ash'ari (may Allah be pleased with him) narrated that I was with the Messenger of Allah (peace and blessings be upon him) in a garden of Madinah (Bir Aris) when a person came and asked for the door to be opened. The Prophet (peace and blessings be upon him) said, "Open the door for him and give him the glad tidings of Paradise." I opened the door and it was Hazrat Abu Bakr (may Allah be pleased with him). I conveyed to him the glad tidings of Paradise as the Prophet (peace and blessings be upon him) had said, and he praised Allah for it. Then another person came and asked for the door to be opened. On this occasion too, the Prophet (peace and blessings be upon him) said, "Open the door for him and give him the glad tidings of Paradise." I opened the door and it was Hazrat Umar (may Allah be pleased with him). When I informed him of the Prophet's (peace and blessings be upon him) words, he also praised and glorified Allah. Then a third person came and asked for the door to be opened. For him as well, the Messenger of Allah (peace and blessings be upon him) said, "Open the door for him and give him the glad tidings of Paradise after the trials and tribulations with which he will be faced (in this world)." He was Hazrat Uthman (may Allah be pleased with him). When I informed him of the Prophet's (peace and blessings be upon him) words, after praising and glorifying Allah, he said, "Allah alone is the Helper."