"One of you should not say (in his supplication): O Allah, forgive me if You please, show mercy to me if You please.' Rather, be firm in your asking, for no one can force Him." (Using translation from Abū Dāʾūd 1483)
قَالَ رَسُولُ اللهِ ﷺ لَا يَقُولَنَّ أَحَدُكُمْ اللهُمَّ اغْفِرْ لِي إِنْ شِئْتَ اللهُمَّ ارْحَمْنِي إِنْ شِئْتَ وَلَكِنْ لِيَعْزِمِ الْمَسْأَلَةَ فَإِنَّهُ لَا مُكْرِهَ لَهُ