It is narrated from Sayyiduna Ibn Mas'ud (may Allah be pleased with him) that he helped the Messenger of Allah (peace and blessings be upon him) perform ablution with nabidh (water in which dates were steeped), and he (peace and blessings be upon him) performed ablution and said: "It is a purifying drink."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 9925