And the 229th prohibition is that we are forbidden from aban­doning the Levites by not giving them their complete portions and not bringing them joy on the festivals.1

The source of this commandment is G‑d's statement,2 "You must be careful lest you abandon the Levite all your days." The Sifri says, "The expression, 'you must be careful,' indicates a nega­tive commandment. The expression, 'lest,' indicates a negative com­mandment."