Hadhrat Anas radiyallahu anhu says: “We were sitting with the Messenger of Allah sallallahu alayhi wa sallam when he said, “A man who is from the inmates of Jannah is about to arrive.” Soon thereafter, a Sahabi radiyallahu anhu came in, with his shoes held in his left hand and the water of wudhu dripping from his beard. When the gathering ended, Hadhrat Abdullah bin Amr bin Aas radiyallahu anhu followed this person (with the motive of learning the reason for him being blessed with such a beautiful glad tiding).
He said to him: “I have taken an oath that I will not go home for three days. Is it possible for you to accommodate me for this time?” The Sahabi agreed. Hadhrat Abdullah bin Amr stayed with him for three days, but noticed nothing extraordinary about his routine. i.e, he never engaged in additional voluntary deeds as expected.
However, whenever this Sahabi radiyallahu anhu would go to bed at night, he would recite some form of zikr, then sleep till Fajr. Furthermore, during these three days he did not hear him utter any word besides good.
Hadhrat Abdullah bin Amr radiyallahu anhu says: “After three nights I almost deemed his deeds as ‘nothing so special’. I approached him and explained that my real motive for staying with him was to discover the special act that he may be engaging in, which warranted the guarantee of Jannah.” Then I asked him: “How did you achieve such a rank?” He said, “I have no special deeds beside whatever you have seen during your stay.” I accepted this and was about to leave when he exclaimed: “Oh yes! There is something. I do not harbour any evil or malice in my heart against any fellow Muslim. I am not jealous over whatever good Allah bestows upon any of them.” Sayyiduna Abdullah bin Amr radiyallahu anhu said: “That is precisely the reason for you reaching such a lofty status.”