Hazrat Abu Bakr (radhiyallahu ‘anhu) had a slave who would work and give him the profits.

One night, the slave presented Hazrat Abu Bakr (radhiyallahu ‘anhu) with some food that he had earned. As soon as the food was placed before him, Hazrat Abu Bakr (radhiyallahu ‘anhu) picked up a morsel and began to eat. Seeing this, the slave was surprised and asked, “Generally, you ask me regarding the source of my income. How is it that on this occasion, you have not asked me?” Hazrat Abu Bakr (radhiyallahu ‘anhu) replied, “I was overcome by extreme hunger due to which I forgot to ask you. Tell me where you acquired this food from.”