once
وَقَالَ صلى الله عليه وسلم: ((إِنَّهُ لَيُغَانُ عَلَى قَلْبِي وَإِنِّي لأَسْتَغْفِرُ اللَّهَ فِي الْيَوْمِ مِائَةَ مَرَّةٍ)).
Meaning
(He also said: ‘verily my heart becomes preoccupied, and verily I seek Allah’s forgiveness a hundred times a day.)(preoccupied: i.e. in a state of ‘forgetfulness’. The Prophet always used to increase in his remembrance of his Lord, in attaining a nearness to Allah and having consciousness of Allah to the extent that if this intensity lessened in anyway, he would regard it as a sin and would then race to seek forgiveness from Allah.)
Source and references
Hisn al-Muslim, entry 253.The reference is copied from the edition; separate editorial verification is not complete yet.
Source edition: Fortress of the Muslim. Open source ↗