وَلِأَصْحَابِ «اَلسُّنَنِ«: «اِغْتَسَلَ بَعْضُ أَزْوَاجِ اَلنَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فِي جَفْنَةٍ، فَجَاءَ لِيَغْتَسِلَ مِنْهَا، فَقَالَتْ لَهُ: إِنِّي كُنْتُ جُنُبًا، فَقَالَ: «إِنَّ اَلْمَاءَ لَا يُجْنِبُ» وَصَحَّحَهُ اَلتِّرْمِذِيُّ، وَابْنُ خُزَيْمَةَ»
And Ashab As-Sunan (compilers of the prophet’s sayings) reported that one of the wives of the Prophet (sallallahu alayhi wa sallam) took bath from a vessel, then came the Prophet (sallallahu alayhi wa sallam) and when he wanted to take bath from that (vessel), she said, “I was sexually impure”. He said, “Water does not become sexually impure”.
Bulugh al-Maram 10, Book 1, The Book of Purification, Hadith 10. 1 min read