No one offers a supplication with out receiving a respond; either he will be given a speedy answer in this world or he will be given a late reward in the next world,or an amount of his sins which is equivalent to his supplication will be removed from him.Provided he does not ask for something sinful or for breaking ties of relationship;provided he does not demand an answer quickly saying, ‘ I have made supplication to my Lord but he does not answer me’.
[Tirmidhi transmitted it from Abu Hureyra,for whom Allah's Good pleasure is prayed ]