It was narrated from Abdur-Rahman bin Kab bin Malik, about Kab: "When Kab was dying, Umm e Bishr bint Bara bin Marur came to him and said: O Abu Abdur-Rahmanl If you meet so-and-so, convey Salam to him from me. He said: May Allah forgive you, O Umm Bishr! We are too busy to think of that. She said: O Abu Abdur-Rahman ! Did you not hear the Messenger of Allah ﷺ say: "The souls of the believers are in green birds, eating from the trees of Paradise"? He said: Yes. She said: That is what I mean. (Daif)