It was narrated from Huthaifah that the Prophet ﷺ met him when he was Junub:

"And he came close to me and reached out his hand. I said: 'I am Junub.' He said: 'The Muslim is not made impure (Najis).'"

أَخْبَرَنَا إِسْحَاقُ بْنُ مَنْصُورٍ، قَالَ أَخْبَرَنَا يَحْيَى، قَالَ حَدَّثَنَا مِسْعَرٌ، قَالَ حَدَّثَنِي وَاصِلٌ، عَنْ أَبِي وَائِلٍ، عَنْ حُذَيْفَةَ، أَنَّ النَّبِيَّ ﷺ لَقِيَهُ وَهُوَ جُنُبٌ . فَأَهْوَى إِلَىَّ فَقُلْتُ إِنِّي جُنُبٌ فَقَالَ " إِنَّ الْمُسْلِمَ لاَ يَنْجُسُ " .