´Abu Hurairah narrated that:` The Messenger of Allah (ﷺ) said: “Whoever sits in a sitting and engages in much empty, meaningless speech and then says before getting from that sitting of his: ‘Glory is to You, O Allah, and praise, I bear witness that there is none worthy of worship except You, I seek You forgiveness, and I repent to You, (Subḥānaka Allāhumma wa biḥamdika, ashhadu an lā ilāha illā anta, astaghfiruka wa atūbu ilaik)’ whatever occurred in that sitting would be forgiven to him.”
Hadith Referenceسنن ترمذي / كتاب الدعوات عن رسول الله صلى الله عليه وسلم / 3433
´Ibn Umar said:` “In one sitting of the Messenger of Allah (ﷺ), one could count that he said a hundred time, before he would get up: ‘O my Lord, forgive me, and accept my repentance. Verily, You are the Oft-Returning, the Most Forgiving (Rabbighfirlī watub `alayya innaka antat-Tawwābul-Ghafūr).’”
Hadith Referenceسنن ترمذي / كتاب الدعوات عن رسول الله صلى الله عليه وسلم / 3434
Hadith Gradingالألبانی:صحيح، ابن ماجة (3814)
Hadith Takhrij«سنن ابی داود/ الصلاة 361 (1516) ، سنن ابن ماجہ/الأدب 57 (3814) ( تحفة الأشراف : 8422) (صحیح)»