John Gill Commentary Leviticus 26:14

"But if ye will not hearken unto me, and will not do all these commandments;" — Leviticus 26:14 (ASV)

But if you will not hearken unto me
To his commandments, as the rule of their duty, and to his promises, as an encouragement to it, or to his prophets and ministers, explaining and enforcing his law, and exhorting to a cheerful obedience to it; so the Targum of Jonathan, "if you will not hearken to the doctrine of them that teach my laws;" which was the sin of the Jews in later times, for which captivity and other calamities befell them, (Jeremiah 7:25) (Jeremiah 25:3Jeremiah 25:4) (44:5) ;

and will not do all these commandments
which he had delivered to them by Moses, whether moral, ceremonial, or judicial, recorded in this book and in the preceding; even all of them were to be respected, attended to, and performed, for the law curses everyone that does not do all things it requires, (Galatians 3:10) .