It wasnarrated from Abu Hurairah that the Messenger of Allah (ﷺ)said:
'Do not make Nabidh with dried dates and unripe dates together,make Nabidh with each of them on its own." (FR)
English reference (FR): Vol. 4, Book 30, Hadith 3396 (FR)
Arabic reference (FR): Book 30, Hadith 3522 (FR)