Once the Holy Prophet (s.a.w.s.) was sitting on the barren ground with no grass on it. He ordered his companions to gather fuel to lit a fire.They replied that they were in a place where there was impossible to find dry grass for fuel. The Prophet (s.a.w.s.) told them to gather whatever they could. Each one of them collected a small quantity and slowly it became a heap. The Prophet (s.a.w.s.) looked at the heap of grass and said,
“In the same manner sins of people will be collected on the day of Qiyamat.” The Prophet (s.a.w.s.) wanted to tell his companions that as the dry grass cannot be seen in that barren land, but when searched for can turn out to be a heap. In the same manner the small sins which a person commits cannot be seen, but on the day of Qiyamat when all sins will be gathered they will amount to a large stock.