Charles Ellicott Commentary 2 Chronicles 6:24

"And if thy people Israel be smitten down before the enemy, because they have sinned against thee, and shall turn again and confess thy name, and pray and make supplication before thee in this house;" — 2 Chronicles 6:24 (ASV)

And if your people Israel are defeated. —See the margin. Kings has a different construction, when your people Israel are smitten. (Compare to 2 Chronicles 6:26).

Because they have sinned. — When or if they sin (so also in 2 Chronicles 6:26). Septuagint, ἐὰν ἁμάρτωσίν. Vulgate, peccabunt enim tibi, as a parenthesis. Syriac and Arabic, when. Kings, if (’ asher) they sin, a rarer usage.