It is narrated from Sayyiduna Abu Umamah al-Bahili (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Nothing makes water impure, except what overpowers its taste and smell."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الطهارة / 1226