Charles Ellicott Commentary 2 Chronicles 29:11

"My sons, be not now negligent; for Jehovah hath chosen you to stand before him, to minister unto him, and that ye should be his ministers, and burn incense." — 2 Chronicles 29:11 (ASV)

My sons. —A condescending term from the king, just as my father was a term of respect (2 Kings 2:12; 2 Kings 5:13; 2 Kings 13:14).

Do not now be negligent. —The Niphal form of the verb shalah (“to be at ease”) occurs nowhere else. The margin is incorrect.

The Lord has chosen you. —You has the Lord chosen. The pronoun is emphatic. (Compare to the similar words: 1 Chronicles 23:13; Deuteronomy 10:8.)

To stand before him, (in order) to serve him, is the construction.

And that you should minister. —Literally, And to become to him ministers and thurifers.

The thoughts and the style of the royal address make it evident enough that it is a free composition, in the well-known manner of ancient historians.