Messenger of Allah ﷺ said, "The invocation of anyone of you is granted (by Allah) if he does not show impatience (by saying, "I invoked Allah but my request has not been granted.")  

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ يُسْتَجَابُ لأَحَدِكُمْ مَا لَمْ يَعْجَلْ يَقُولُ دَعَوْتُ فَلَمْ يُسْتَجَبْ لِي