Assalam o alaikum!
If you pay for Almighty Allah then Almighty Allah will repent you more than you. But Allah will repent you even 10 times more than you have paid. Let me share one story
Once a young boy was selling goods from house to house in the village . His name is Haward kelly. He became hungry and he thought that he will ask for food from any house.
After moving forward he knock at the door. The door opened and a woman appeared. Instead of asking for meal he ask to the woman for a something to drink.
The woman took a cup of milk for the boy and he drank it slowly and asked how much i owe you?
woman replied "you donot need to owe anything" Mother has taught us never pay for kindness.
Year's later the woman became ill. Village doctor refuse to treat her because her problem was serious. They suggest that to take her to the city.
woman was shifted to city hospital. As the woman was entering to the hospital at the same time Doctor haward kelly was passing that way. He doubt that he had saw that woman already.
He went to room where she was admitted to the room for confirming that whether she is that woman which he was thinking.
He saw her and confirmed that she is the woman who had helped him recently.
Haward kelly promised himself that he will save the life of woman.
Doctor Haward kelly started the treatment wearing doctor's dress. Woman does not know him he is the same boy who had helped him recently.
As the treatment completed the woman recovered.
Bill was prepared and she was thinking that she had to pay whole life for the treatment.
As bill was prepared and sent to the woman and on one side of the bill it was written that bill had been paid by one cup of milk. This bill is from the Haward kelly.