Musannaf Ibn Abi Shaybah 25595 — Mixing unripe dates, dates

It is narrated from Yazid bin Kaysan that he said: I asked Abu al-Sha'tha Jabir bin Zayd about fadikh. He asked: What is fadikh? I said: Ripe and semi-ripe dates. At this he said: By Allah, if you were to take plain water, boil it and then put it in your stomach, that would be better than gathering ripe and semi-ripe dates together in your stomach.