en_tn/lev/25/04.md

a Sabbath of solemn rest for the land must be observed

Not farming the land is spoken of as letting the land rest. This can be stated in active form. Alternate translation: "you must observe a Sabbath of solemn rest for the land" or "you must obey the Sabbath law by not farming the land every seventh year" (See: rc://en/ta/man/translate/figs-activepassive and rc://en/ta/man/translate/figs-metaphor)