Sunan an-Nasa'i 5719

Muhammad ibn al-Muthanna narrated to us: Ibn Abi ʿAdi narrated to us, from Dawud, who said: I asked Saʿid, “What is the drink that ʿUmar, may Allah be pleased with him, declared permissible?” He said: “The one boiled until two-thirds of it evaporates and one-third remains.”