Narrated Abu Huraira:

Allah's Apostle came across me and I was Junub He took my hand and I went along with him till he sat down I slipped away, went home and took a bath. When I came back. he was still sitting there. He then said to me, "O AbuHuraira! Where have you been?' I told him about it The Prophet ﷺ said, "Subhan Allah! O Abu Huraira! A believer never becomes impure."

حَدَّثَنَا عَيَّاشٌ، قَالَ حَدَّثَنَا عَبْدُ الأَعْلَى، حَدَّثَنَا حُمَيْدٌ، عَنْ بَكْرٍ، عَنْ أَبِي رَافِعٍ، عَنْ أَبِي هُرَيْرَةَ، قَالَ لَقِيَنِي رَسُولُ اللَّهِ ﷺ وَأَنَا جُنُبٌ، فَأَخَذَ بِيَدِي، فَمَشَيْتُ مَعَهُ حَتَّى قَعَدَ فَانْسَلَلْتُ، فَأَتَيْتُ الرَّحْلَ، فَاغْتَسَلْتُ ثُمَّ جِئْتُ وَهْوَ قَاعِدٌ فَقَالَ " أَيْنَ كُنْتَ يَا أَبَا هِرٍّ " فَقُلْتُ لَهُ. فَقَالَ " سُبْحَانَ اللَّهِ يَا أَبَا هِرٍّ إِنَّ الْمُؤْمِنَ لاَ يَنْجُسُ ".