500
There is a story of a poor, blind, old woman living in the outskirts of Madinah. Every morning, `Umar Ibn Al-Khattab, another great companion, used to go to her house to see if she needed anything. But he always found that someone else had come before him and given her all that she needed.`Umar wanted to find out who this person was, so one morning he went there earlier than he usually did to find that the man who visited the old lady every morning was ________?
Who was Abu Bakr (Radiya Allaahu 'anhu)