Abu Dawud Book 20, Hadith Number 3695.
Chapter : Drink made from mixing of various kinds of dates or dates and raisins.
Narated By N/A : ‘Abd Allah b. Abi Qatadah said that his father Abu Qatadah forbade mixing raisins and dried dates, mixing unripe dates and fresh dates, and mixing dates beginning to take on colour and fresh dates. He said: Make nabidh (drink) from each separately.
He (the narrator Yahya) said : Abu Salamah b. ‘Abd al-Rahman narrated to me this tradition on the authority of Abu Qatadah from the Prophet (may peace be upon him).