《旧唐书·本纪·卷八》
天下各州各府春秋二时祭祀土地神以及陈设酒祭祀先圣先师，停止用猪、牛、羊，只用酒宴欢庆，永为常法。
天下州府春秋二时社及释奠，停牲牢，唯用酒酺，永为常式。
In autumn and spring, all states and prefectures across the country will sacrifice to the gods of the land and offer sacrifices to the sages and sages with wine. It is forbidden to use pigs, cattle and sheep. Only banquets will be used to celebrate. This will be a permanent practice.