The Prophet ﷺ forbade a man from performing ablution with the water left over from a woman's use.
حدثنا وهب بن جرير قال حدثنا شعبة عن عاصم الأحول عن أبي حاجب
أن النبي ﷺ نهى أن يتوضأ الرجل من سؤر المرأة
Its isnad is sahih. Abu Hajib is Sawadah bin Asim, who is trustworthy and has a narration in Muslim. The hadith was also related by Abu Dawud 1/63, no. 40, Tirmidhi 1/93, Nasai 1/179, no. 343, and Ibn Majah 1/132, no. 373.