《旧唐书·本纪·卷十五》
三月十二日，因为发生旱灾，敕令各司从宽判处在押的囚犯。
庚午，以旱，敕诸司疏决系囚。
On the twelfth day of the third month, because of the drought, the emperor ordered the various departments to release imprisoned prisoners with leniency.