"One of you is granted an answer (to his supplication) provided he does not say: 'I prayed but I was not granted an answer.'" (Using translation from Abū Dāʾūd 1484)
أَنَّ رَسُولَ اللهِ ﷺ قَالَ يُسْتَجَابُ لِأَحَدِكُمْ مَا لَمْ يَعْجَلْ فَيَقُولُ قَدْ دَعَوْتُ فَمَا يُسْتَجَابُ لِي