It was narrated from Abu Hurairah that the Prophet ﷺ met him in one of the streets of Al-Madinah while he was Junub, so he slipped away from him and performed Ghusl. The Prophet ﷺ noticed he was not there, and when he came he said:

'Where were you, O Abu Hurairah?' He said: 'O Messenger of Allah, you met us but I was Junub, and I did not want to sit in your presence until I had performed Ghusl.' He said: 'Subhan Allah! The believer is not made impure (Najis).'"

أَخْبَرَنَا حُمَيْدُ بْنُ مَسْعَدَةَ، قَالَ حَدَّثَنَا بِشْرٌ، - وَهُوَ ابْنُ الْمُفَضَّلِ - قَالَ حَدَّثَنَا حُمَيْدٌ، عَنْ بَكْرٍ، عَنْ أَبِي رَافِعٍ، عَنْ أَبِي هُرَيْرَةَ، أَنَّ النَّبِيَّ ﷺ لَقِيَهُ فِي طَرِيقٍ مِنْ طُرُقِ الْمَدِينَةِ وَهُوَ جُنُبٌ فَانْسَلَّ عَنْهُ فَاغْتَسَلَ فَفَقَدَهُ النَّبِيُّ ﷺ فَلَمَّا جَاءَ قَالَ " أَيْنَ كُنْتَ يَا أَبَا هُرَيْرَةَ " . قَالَ يَا رَسُولَ اللَّهِ إِنَّكَ لَقِيتَنِي وَأَنَا جُنُبٌ فَكَرِهْتُ أَنْ أُجَالِسَكَ حَتَّى أَغْتَسِلَ . فَقَالَ " سُبْحَانَ اللَّهِ إِنَّ الْمُؤْمِنَ لاَ يَنْجُسُ " .