וְאַל־תְּכַס֙ עַל־עֲוֺנָ֔ם וְחַטָּאתָ֖ם מִלְּפָנֶ֣יךָ אַל־תִּמָּחֶ֑ה כִּ֥י הִכְעִ֖יסוּ לְנֶ֥גֶד הַבּוֹנִֽים׃
and cover not their iniquity, and let not their sin be blotted out from before Thee; for they have vexed Thee before the builders.
Rashi on Nehemiah
And do not conceal Heb. וְאַל תְּכַס, like וְאַל תְּכַסֶה, similar to (Prov. 25:9): “...but do not divulge (תְּגָל) another’s secret,” like תְּגַלֶה.
Rashi on Nehemiah
for they have provoked that they have provoked the builders to ridicule them.