'Commandment' in the Bible

The sons of Levi who receive the priestly office have a command according to the law to collect a tenth from the people—that is, from their brothers—though they have also descended from Abraham.

So the previous command is annulled because it was weak and unprofitable

For when every command had been proclaimed by Moses to all the people according to the law, he took the blood of calves and goats, along with water, scarlet wool, and hyssop, and sprinkled the scroll itself and all the people,