The Prophet ﷺ forbade combining unripe dates with ripe dates, and Zabib with dates.
أخبرنا إسحق بن منصور قال أنبأنا عبد الرحمن عن شعبة عن الحكم عن ابن أبي ليلى
أن النبي ﷺ نهى عن البلح والتمر والزبيب والتمر
[Its chain of transmission is sahih]. Abu Dawud narrated it in the Book of Drinks, chapter on mixing two kinds (of dried fruits or dates), hadith no. 3705, from the hadith of Shuba with this wording, and it is also found in Al-Kubra, hadith no. 5056. Hakam bin Utayba explicitly stated that he heard it directly, as recorded by Ahmad, 4/314.