Hadith 5543
Chapter 2: The Drinks Which Were Destroyed When Khamr Was Prohibited - كتاب الأشربة
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."
Reference : Sunan an-Nasa'i 5543
In-book reference : Book 51, Hadith 4