John Gill Commentary 2 Chronicles 14:4

"and commanded Judah to seek Jehovah, the God of their fathers, and to do the law and the commandment." — 2 Chronicles 14:4 (ASV)

And commanded Judah to seek the Lord God of their fathers
To pray to him, and him only, and attend his worship and service; this he did by a public edict:

and to do the law and the commandment :
to observe all the laws of God, moral, ceremonial, and civil.