It is narrated from Sayyiduna Abu Hurairah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Your supplication is accepted as long as he does not hasten, saying: I made supplication but it was not accepted."
Hadith Referenceالادب المفرد / كتاب / 654
Hadith Gradingالألبانی:صحيح
Hadith Takhrij«صحيح : أخرجه البخاري ، كتاب الدعوات : 6340 و مسلم : 2735 و أبوداؤد : 1484 و الترمذي : 3387 و ابن ماجة : 3853»
Narrated from Sayyiduna Abu Hurairah (may Allah be pleased with him) that the Prophet (peace and blessings of Allah be upon him) said: "The supplication of every one of you is certainly accepted as long as he does not pray for a sin or for severing ties of kinship, or he does not become hasty, such that he says: I made supplication but I do not think it has been accepted, then he gives up supplicating."