Sayyiduna Abu Hurayrah (may Allah be pleased with him) narrates: I learned that he (peace and blessings be upon him) was fasting, so I made preparations for his (peace and blessings be upon him) iftar and made nabidh in a gourd vessel. Then I brought it to him (peace and blessings be upon him), and it had formed froth. He (peace and blessings be upon him) said: "Strike it against this wall; this is the drink of those who do not believe in Allah and the Last Day."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الأشربة والحد فيها / 17433