佛祖統紀 39.40

39.40

二年。詔依佛制。正五九月及月十齋日。不得行刑屠釣。永為國式。

In the second year, an edict decreed that in accordance with Buddhist rules, executions, butchering, and fishing were prohibited during the first, fifth, and ninth months, as well as on the ten vegetarian days of each month, to serve forever as a national statute.