Charles Ellicott Commentary 2 Chronicles 15:7

"But be ye strong, and let not your hands be slack; for your work shall be rewarded." — 2 Chronicles 15:7 (ASV)

Be you strong therefore. —Rather, But you, be you strong.

Be weak. — Droop, or hang down (Zephaniah 3:16; 2 Samuel 4:1).

Your work shall be rewarded. —Literally, there is indeed a reward for your work; words occurring in Jeremiah 31:16. We have here the moral of the prophet’s address. The ruinous results of not “seeking,” and “forsaking,” Jehovah (2 Chronicles 15:2) have been briefly but powerfully sketched from the past history of the nation. The conclusion is, Do not you fall away like your forefathers; but let your allegiance to Jehovah be decided and sincere.

Your work. —Of rooting out idolatry.