Mishkat al-Masabih #2130

He reported God’s messenger as saying, “A servant is granted an answer provided he does not ask for anything sinful or for breaking ties of relationship, and provided he does not demand an answer quickly.” On being asked what demanding an answer quickly meant, God’s messenger replied, “It is when he says he has prayed and prayed and does not think he will be answered, so he grows weary in such circumstances and gives up supplication.” Muslim transmitted it.