(a) It is narrated from Sayyiduna al-Hakam bin Amr (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) forbade a man to perform ablution with the water left over from a woman's ablution. (b) It is narrated from Imam Abu Dawud al-Tayalisi (may Allah have mercy on him), and in it are the words 'or he said: with her leftover', meaning "with the water she has left over."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الطهارة / 915