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." (JA)
English reference (JA): Vol. 4, Book 30, Hadith 3396 (JA)
Arabic reference (JA): Book 30, Hadith 3522 (JA)