Charles Ellicott Commentary 2 Chronicles 30:8

"Now be ye not stiffnecked, as your fathers were; but yield yourselves unto Jehovah, and enter into his sanctuary, which he hath sanctified for ever, and serve Jehovah your God, that his fierce anger may turn away from you." — 2 Chronicles 30:8 (ASV)

Do not be stiff-necked. — Do not harden your neck like your fathers. 2 Kings 17:14, and they hardened their neck like their fathers’ neck. (Jeremiah 7:26; Psalms 95:8–9).

But yield yourselves. —Omit but, and place a period after fathers. This means “yield your hand to Jehovah,” that is, submit to Him. So 1 Chronicles 29:24. The phrase also means “to make an agreement with” (Ezra 10:19; 2 Kings 10:15). .

Enter into his sanctuary ... serve the Lord. —Compare Psalm 100:1; Psalms 100:4.

Which he has sanctified forever. — 2 Chronicles 7:16; 2 Chronicles 7:20.

That the fierceness (heat) ... from you. — 2 Chronicles 29:10. Such resemblances prove the ideal character of these addresses.