«ما من عبد يرفع يديه........ يسأل الله مسألة إلا آتاه إياها ما لم يعجل يقول: قد سألت وسألت فلم أعط شيئا»
The Prophet (peace and blessings be upon him) said:
"There is no servant who raises his hands and asks Allah for something except that Allah grants it to him, as long as he does not become hasty, saying: 'I asked and asked, but I was not given anything.'"
Hadith Referenceصحیح الجامع الصغیر / حرف الميم / 5739