Narrator:Abu Hurayrah
وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ أَبِي الزِّنَادِ، عَنِ الأَعْرَجِ، عَنْ أَبِي هُرَيْرَةَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ
" لاَ يَقُلْ أَحَدُكُمْ إِذَا دَعَا اللَّهُمَّ اغْفِرْ لِي إِنْ شِئْتَ اللَّهُمَّ ارْحَمْنِي إِنْ شِئْتَ لِيَعْزِمِ الْمَسْأَلَةَ فَإِنَّهُ لاَ مُكْرِهَ لَهُ "
Yahya related to me from Malik from Abu'z Zinad from al-Araj from Abu Hurayra that the Messenger of Allah, may Allah bless him and grant him peace, said, ''When you are making dua do not say; 'O Allah, forgive me if You wish. O Allah, forgive me if you wish.' You should be firm in your asking, for there is no compelling Him."
Reported by Malik (No. 500), Al-Bukhari (No. 6339, 7477), Muslim (No. 2679a, 2679b), Abu Dawud (No. 1483), At-Tirmidhi (No. 3497), Ibn Majah (No. 3854) and Ahmad (No. 7013, 7889, 9589, 9600, 9919, 10089, 10447).