Mishkat al-Masabih 17 Prescribed Punishments كتاب الحدود 77

وَعَنْ أَبِي قَتَادَةَ: أَنَّ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ نَهَى عَنْ خَلِيطِ التَّمْرِ وَالْبُسْرِ وَعَنْ خَلِيطِ الزَّبِيبِ وَالتَّمْرِ وَعَنْ خَلِيطِ الزَّهْوِ وَالرُّطَبِ. وَقَالَ: «انْتَبِذُوا كُلَّ وَاحِدٍ عَلَى حِدَةٍ» . رَوَاهُ مُسلم

Abu Qatada told that the Prophet forbade mixing dried dates and unripe dates, mixing raisins and dried dates, and mixing dates beginning to take on colour and fresh dates, and told them to make nabidh from each separately. Muslim transmitted it.