Narrated Abu Musa Al-Ashari (RA):
I performed ablution in my house and then went out and said, "Today I shall stick to Allahs Apostle ﷺ and stay with him all this day of mine (in his service)." I went to the Mosque and asked about the Prophet ﷺ . They said, "He had gone in this direction." So I followed his way, asking about him till he entered a place called Bir Aris. I sat at its gate that was made of date-palm leaves till the Prophet ﷺ finished answering the call of nature and performed ablution. Then I went up to him to see him sitting at the well of Aris at the middle of its edge with his legs uncovered, hanging in the well. I greeted him and went back and sat at the gate. I said, "Today I will be the gatekeeper of the Prophet." Abu Bakr (RA) came and pushed the gate. I asked, "Who is it?" He said, "Abu Bakr." I told him to wait, went in and said, "O Allahs Apostle ﷺ ! Abu Bakr (RA) asks for permission to enter." He said, "Admit him and give him the glad tidings that he will be in Paradise." So I went out and said to Abu Bakr, "Come in, and Allahs Apostle ﷺ gives you the glad tidings that you will be in Paradise" Abu Bakr (RA) entered and sat on the right side of Allahs Apostle ﷺ on the built edge of the well and hung his legs n the well as the Prophet ﷺ did and uncovered his legs. I then returned and sat (at the gate). I had left my brother performing ablution and he intended to follow me. So I said (to myself). "If Allah wants good for so-and-so (i.e. my brother) He will bring him here." Suddenly somebody moved the door. I asked, "Who is it?" He said, "Umar bin Al-Khattab (RA)." I asked him to wait, went to Allahs Apostle, greeted him and said, Umar bin Al-Khattab (RA) asks the permission to enter." He said, "Admit him, and give him the glad tidings that he will be in Paradise." I went to "Umar and said "Come in, and Allahs Apostle, gives you the glad tidings that you will be in Paradise." So he entered and sat beside Allahs Apostle ﷺ on the built edge of the well on the left side and hung his legs in the well. I returned and sat (at the gate) and said, (to myself), "If Allah wants good for so-and-so, He will bring him here." Somebody came and moved the door. I asked "Who is it?" He replied, "Uthman bin Affan." I asked him to wait and went to the Prophet ﷺ and informed him. He said, "Admit him, and give him the glad tidings of entering Paradise, I asked him to wait and went to the Prophet ﷺ and informed him. He said, "Admit him, and give him the glad tidings of entering Paradise after a calamity that will befall him." So I went up to him and said to him, "Come in; Allahs Apostle ﷺ gives you the glad tidings of entering Paradise after a calamity that will befall you. "Uthman then came in and found that the built edge of the well was occupied, so he sat opposite to the Prophet ﷺ on the other side. Said bin Al-Musaiyab said, "I interpret this (narration) in terms of their graves."