Hadith on Repentance: If you did not sin, Allah would replace you with people who would sin and He would forgive them

Abu Huraira رضي الله عنه reported: The Messenger of Allah صلى الله عليه وسلم said, “By Him in whose Hand is my life, if you did not sin Allah would replace you with people who would sin and He would forgive them.”
[Sahih Muslim, Book 37, Number 6622]

عَنْ أَبِي هُرَيْرَةَ قَالَ  قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ وَالَّذِي نَفْسِي بِيَدِهِ لَوْ لَمْ تُذْنِبُوا لَذَهَبَ اللَّهُ بِكُمْ وَلَجَاءَ بِقَوْمٍ يُذْنِبُونَ فَيَسْتَغْفِرُونَ اللَّهَ فَيَغْفِرُ لَهُمْ