Hadith
وَحَدَّثَنِي يَحْيَى، عَنْ مَالِكٍ، عَنْ زَيْدِ بْنِ أَسْلَمَ، عَنْ عَطَاءِ بْنِ يَسَارٍ، . أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم نَهَى أَنْ يُنْبَذَ الْبُسْرُ وَالرُّطَبُ جَمِيعًا وَالتَّمْرُ وَالزَّبِيبُ جَمِيعًا .
Yahya related to me from Malik from Zayd ibn Aslam from Ata ibn Yasar that the Messenger of Allah, may Allah bless him and grant him peace, forbade preparing nabidh from nearly ripe dates and fresh dates together, and from dates and raisins together
Sahih · Salim al-Hilali
Muwatta Malik 1543 ·Book 42, Hadith 7·Also available on sunnah.com·