Now it is in mine heart. — See for this phrase and construction 1 Chronicles 22:7; 1 Chronicles 28:2; 2 Chronicles 6:7.
To make a covenant with. — The preposition is for. (See Note on 2 Chronicles 21:7.)
Turn away. — Literally, return (Isaiah 5:25). “That his fierce wrath may turn away from Israel” (Numbers 25:4).