When the time came that Rabe’a should die, those attending her deathbed left the room and closed the door. Then a voice was heard saying, O soul at peace, return unto thy Lord, well-pleased! A time passed and no sound came from the room, so they opened the door and found that she had given up the ghost.
After her death she was seen in a dream. She was asked “How did you fare with Monkar and Nakir?” She replied “Those youths came to me and said, ‘Who is thy Lord?’ I answered, ‘Return and say to God, with so many thousand thousand creatures Thou didst not forget one feeble old woman. I, who have only Thee in the whole world, I shall never, forget Thee, that Thou shouldst send one to ask me, Who is thy God?’”
Story of Rabia of Basra
Found in The Memorial of the Saints, by Attar