أَخْبَرَنَا سُوَيْدُ بْنُ نَصْرٍ، قَالَ أَنْبَأَنَا عَبْدُ اللَّهِ، عَنْ حُمَيْدٍ الطَّوِيلِ، عَنْ أَنَسِ بْنِ مَالِكٍ، قَالَ حُرِّمَتِ الْخَمْرُ حِينَ حُرِّمَتْ وَإِنَّهُ لَشَرَابُهُمُ الْبُسْرُ وَالتَّمْرُ‏.‏

It was narrated that Anas bin Malik said: "When Khamr was forbidden, their drink was (made from) unripe dates and dried dates." Translation Not Available

Book Ref: Sunan An Nisai Book 51 Hadith 5543
Web Ref:  Sunan An Nisai Vol 6 Book 51 Hadith 5545