Sa'id bin Jubayr (may Allah have mercy on him) said: I asked Ibn Umar (may Allah be pleased with them both) about nabidh made in earthenware jars, and he said: "The Prophet (peace and blessings be upon him) has forbidden it." He said: I came to Ibn Abbas (may Allah be pleased with them both) and said: Do you know what Ibn Umar (may Allah be pleased with them both) is saying? He asked: What? I said: He says that nabidh of earthenware jars is forbidden. He said: "Yes, the Prophet (peace and blessings be upon him) declared it forbidden." I said: What is nabidh of earthenware jars? He said: Everything that is made from clay.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الأشربة والحد فيها / 17469