Charles Ellicott Commentary 2 Chronicles 30:22

"And Hezekiah spake comfortably unto all the Levites that had good understanding [in the service] of Jehovah. So they did eat throughout the feast for the seven days, offering sacrifices of peace-offerings, and making confession to Jehovah, the God of their fathers." — 2 Chronicles 30:22 (ASV)

Spoke comfortably. —See margin, and compare to Isaiah 40:2.

That taught the good knowledge of the Lord. —Rather, were showing good skill for (in honor of) Jehovah, in their chanting and playing. The king encouraged the musicians with kindly words of praise.

They ate throughout the feast. —Literally, they ate the feast, like “they ate the passover.” The meaning is that the assembly ate the sacrificial meals, which were supplied from the flesh of the “peace offerings.” The phrase is peculiar to this passage. The Septuagint has καὶ συνετέλεσαν, “and they finished:” a difference which implies no great change in the Hebrew writing, but is against the context.

Making confession. —LXX. rightly, ἐξομολογούμενοι. The meaning is “yielding hearty thanks,” “acknowledging the Divine goodness.” Everywhere else the Hebrew word means “to confess guilt” (Nehemiah 9:3; Leviticus 5:5; Numbers 5:7).