'Required' in the Bible

This is the law for the one in whom there is an infection of leprosy, whose means are limited for his [ceremonial] cleansing.”

"This statute is required so that the Israelis may bring their sacrifices that they have been sacrificing to the LORD in the open field to the priest at the entrance to the Tent of Meeting, where they are to slaughter their peace offering to the LORD.

‘And if a man consecrates to the Lord part of a field of his own property, then your valuation shall be proportionate to the seed needed for it; a homer of barley seed shall be valued at fifty shekels of silver.