Sunan Ibn Majah
Hadith #385
It was narrated from 'Abdullah bin 'Abbas that :On the night of the Jinn the Messenger of Allah said to Ibn Mas'ud: ""Do you have water?"" He said: ""No, only some Nabidh in a large water skin."" The Messenger of Allah said: ""Good dates and pure water."" (i.e. there is no harm from the mixing of the two.) Pour it for me."" He said: ""So I performed ablution with it