Once when Imam Hasan (A) and Imam Husain (A) were children they both fell ill. Their parents Imam Ali (A) and Bibi Fatimah (A) were very sad to see them ill.
When the Holy Prophet (S) found out about the illness he suggested that both his daughter Bibi Fatimah (A) and his cousin and son-in-law Imam Ali (A) should keep Nazr.
Nazr is a promise that you make to Allah. Something that you will do extra for the pleasure of Allah if your wish comes true.
Imam Ali (A) and Bibi Fatimah (A) made a nazr that they would fast three days upon the recovery of their children.
Allah accepted their nazr and both Imam Hasan (A) and Imam Husain (A) recovered from their illness.
Their parents decided to fast the next day to fulfil their nazr and when the children came to know of this they also decided to fast. Their maid Bibi Fizza, who loved the children very much also decided to fast.
On the first day of the fasting, Bibi Fatimah prepared 5 loaves of bread to break their fast with.
In the evening when the time for Salaat set in they all prayed then sat down to break their fast. Just as they were about to eat their loaves of bread there was a knock on the door. There stood a poor man asking for something to eat.
All of them, one by one gave their loaf of bread to the beggar. And had just water instead.
The next day all of them again fasted. Again they were to break their fast with a loaf of bread each which had been baked that morning.
And again as they were about to eat their loaf there was a knock on the door. This time it was an orphan asking for food.
Although they themselves were two days hungry they all happily gave their loaf of bread to the orphan and again slept without any food.
On the third day of their fast as they sat down to break their fast, a prisoner knocked at the door asking for food.
Although by now the family were very hungry as they had not eaten for three days, they again gave away their loaves.
Sura Ad-Dahr in the Holy Qur'an was revealed in praise of the sacrifice made by this family.
Moral:
1-
Nazr is very powerful.
2-
Always think of others before yourself.
3-
It is not how much you give to others that is important but the intention with which you give: i.e. "Qurbatan Ilallah" which means to get closer to Allah.