Sahih al-Bukhari 6338
Sahih al-Bukhari · Book 80: Invocations · One should appeal to Allah with determination
Narrated Anas:
حَدَّثَنَا مُسَدَّدٌ ، حَدَّثَنَا إِسْمَاعِيلُ ، أَخْبَرَنَا عَبْدُ الْعَزِيزِ ، عَنْ أَنَسٍ ـ رضى الله عنه ـ قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " إِذَا دَعَا أَحَدُكُمْ فَلْيَعْزِمِ الْمَسْأَلَةَ، وَلاَ يَقُولَنَّ اللَّهُمَّ إِنْ شِئْتَ فَأَعْطِنِي. فَإِنَّهُ لاَ مُسْتَكْرِهَ لَهُ " .
Allah's Messenger (ﷺ) said, "When anyone of you appeal to Allah for something, he should ask with determination and should not say, 'O Allah, if You wish, give me.', for nobody can force Allah to do something against His Will.