'Compulsory' in the Bible

As for the peoples of the land who bring merchandise or any grain on the Sabbath day to sell, we will not buy from them on the Sabbath or on a holy day; and we will give up raising crops during the seventh year [leaving the land uncultivated], and forgive every debt.

In the days of her affliction and homelessnessJerusalem remembers all her precious thingsThat she had from the days of old,When her people fell into the hand of the adversary,And no one helped her,The enemy saw her,They mocked at her downfall.