Sayyiduna Ibn Abbas (may Allah be pleased with them both) said: "The Messenger of Allah (peace and blessings be upon him) forbade (making nabidh in) gourd vessels, green glazed jars and hollowed-out tree-trunk vessels, and also forbade mixing dates and raisins."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 12303