Sahih al-Bukhari, Hadith 6339 ⓘ
Narrated Abu Huraira: Allah's Messenger said, "None of you should say: 'O Allah, forgive me if You wish; O Allah, be merciful to me if You wish,' but he should always appeal to Allah with determination, for nobody can force Allah to do something against His Will."
حَدَّثَنَا عَبْدُ اللَّهِ بْنُ مَسْلَمَةَ، عَنْ مَالِكٍ، عَنْ أَبِي الزِّنَادِ، عَنِ الأَعْرَجِ، عَنْ أَبِي هُرَيْرَةَ ـ رضى الله عنه ـ أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ " لاَ يَقُولَنَّ أَحَدُكُمُ اللَّهُمَّ اغْفِرْ لِي، اللَّهُمَّ ارْحَمْنِي، إِنْ شِئْتَ. لِيَعْزِمِ الْمَسْأَلَةَ، فَإِنَّهُ لاَ مُكْرِهَ لَهُ " .
also referenced under: Book 80, Hadith 36 (In-Book) & Volume 8, Book 75, Hadith 351 (USC-MSA)