Jami` at-Tirmidhi 1876
جامع الترمذي#1876SahihNarrated Jabir bin ‘Abdullah : "The Messenger of Allah (ﷺ) prohibited making Nabidh from unripend dates and fresh dates together. [Abu 'Eisa said:] This Hadith is Hasan Sahih
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Ahmad Muhammad ShakirSahih
Al-AlbaniSahih
Bashar Awad MaaroufHasan Sahih
Zubair Ali ZaiSahih - Agreed Upon
In-book reference: 26:16