قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم: "وَاللَّهِ إِنِّي لأَسْتَغفِرُ اللَّهَ وَأَتُوبُ إِلَيْهِ فِي الْيَوْمِ أَكْثَرَ مِنْ سَبْعِينَ مَرَّةٍ"
English
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Allah's Messenger (ﷺ) said:
"By Allah, I seek the forgiveness of Allah, and repent to Him more than seventy times in a day.
Reference:
Al-Bukhari, cf. Al-Asqalani, Fathul-Bari 11/101.