John Gill Commentary 2 Kings 18:6

"For he clave to Jehovah; he departed not from following him, but kept his commandments, which Jehovah commanded Moses." — 2 Kings 18:6 (ASV)

For he clung to the Lord
To his worship and service; to the fear of the Lord, as the Targum:

and departed not from following him ;
from his worship, as the same paraphrase:

but kept his commandments, which the Lord commanded Moses ;
both moral, ceremonial, and judicial.