The supplication of one of you is granted if he does not grow impatient and say- I supplicated my Lord but it was not granted. (Using translation from Muslim 2735b)
قَالَ رَسُولُ اللهِ ﷺ إِنَّهُ لَيُسْتَجَابُلِأَحَدِكُمْ مَا لَمْ يَعْجَلْ فَيَقُولُ قَدْ دَعَوْتُ رَبِّي فَلَمْ يَسْتَجِبْ لِي