Nehemiah 13:29
Remember them, O my God, because they have defiled the priesthood, and the covenant of the priesthood, and of the Levites.
Nave's Topical Index—AKJV

Malachi 2:4,5
And you shall know that I have sent this commandment to you, that my covenant might be with Levi, said the LORD of hosts.
Nave's Topical Index—AKJV