[Machine] Musa ﷺ asked his Lord, the Blessed and Exalted, for something and it was delayed and confirmed. So he said, "Whatever Allah wills." When his request was in front of him, he said, "O Lord, I have been seeking my request for such and such a time and now You have given it to me?" Allah revealed to him, "O Musa, don't you know that saying 'whatever Allah wills' is more successful in fulfilling needs?"  

طَلَبَ مُوسَى ﷺ مَنْ رَبِّهِ تَبَارَكَ وَتَعَالَى حَاجَةً فَأَبْطَأَتْ عَلَيْهِ وَأَكَّدَتْ فَقَالَ مَا شَاءَ اللَّهُ فَإِذَا حَاجَتُهُ بَيْنَ يَدَيْهِ قَالَ يَا رَبِّ أَنَا أَطْلُبُ حَاجَتِي مُنْذُ كَذَا وَكَذَا وَأَعْطَيْتَنِيهَا الْآنَ؟ قَالَ فَأَوْحَى اللَّهُ إِلَيْهِ يَا مُوسَى أَمَا عَلِمْتَ أَنَّ قَوْلَكَ مَا شَاءَ اللَّهُ أَنْجَحُ مَا طُلِبَتْ بِهِ الْحَوَائِجُ