وَعَن ابْن عمر قَالَ: إِنْ كُنَّا لَنَعُدُّ لِرَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فِي الْمَجْلِسِ يَقُولُ: «رَبِّ اغْفِرْ لِي وَتُبْ عَلَيَّ إِنَّكَ أَنْتَ التَّوَّابُ الْغَفُورُ» مِائَةَ مَرَّةٍ. رَوَاهُ أَحْمَدُ وَالتِّرْمِذِيُّ وَأَبُو دَاوُدَ وَابْنُ مَاجَهْ
We counted that God’s messenger would say a hundred times during a meeting, “My Lord, forgive me and pardon me; Thou art the Pardoning and Forgiving One.” Ahmad, Tirmidhi, Abu Dawud and Ibn Majah transmitted it.
Source: Mishkat al-Masabih — repository translation · Al-Khatib Al-Tabrizi — authenticity/grade metadata requires independent source review · Sunnah.comAudio not available for the selected reciter.
Source: Mishkat al-Masabih — repository arabic · Al-Khatib Al-Tabrizi · Sunnah.com