Riyad as-Salihin, Book 1, Hadith 18 (In-Book) ⓘ
'Abdullah bin 'Umar bin Al-Khattab (May Allah be pleased with them) reported that: The Prophet said, "Allah accepts a slave's repentance as long as the latter is not on his death bed (that is, before the soul of the dying person reaches the throat)".[At-Tirmidhi, who categorised it as Hadith Hasan].
وعن أبي عبد الرحمن عبد الله بن عمر بن الخطاب رضي الله عنهما عن النبي صلى الله عليه وسلم قال: " إن الله عز وجل يقبل توبة العبد ما لم يغرغر" ((رواه الترمذي وقال: حديث حسن)).