Jabir b. Abdullah al-Ansari reported that Messenger of Allah ﷺ Prohibited the preparation of Nabidh by mixing grapes and fresh dates. and he forbade the preparation of Nabidh by mixing unripe dates with fresh dates.
عَنْ رَسُولِ اللَّهِ ﷺ أَنَّهُ نَهَى أَنْ يُنْبَذَ الزَّبِيبُ وَالتَّمْرُ جَمِيعًا وَنَهَى أَنْ يُنْبَذَ الْبُسْرُ وَالرُّطَبُ جَمِيعًا