Numbers 4:20 Second Temple Literature

וְלֹא־יָבֹ֧אוּ לִרְא֛וֹת כְּבַלַּ֥ע אֶת־הַקֹּ֖דֶשׁ וָמֵֽתוּ׃ (פ)

but they shall not go in to see the holy things as they are being covered, lest they die.’