Targum for Numbers 3:38

וְהַחֹנִ֣ים לִפְנֵ֣י הַמִּשְׁכָּ֡ן קֵ֣דְמָה לִפְנֵי֩ אֹֽהֶל־מוֹעֵ֨ד ׀ מִזְרָ֜חָה מֹשֶׁ֣ה ׀ וְאַהֲרֹ֣ן וּבָנָ֗יו שֹֽׁמְרִים֙ מִשְׁמֶ֣רֶת הַמִּקְדָּ֔שׁ לְמִשְׁמֶ֖רֶת בְּנֵ֣י יִשְׂרָאֵ֑ל וְהַזָּ֥ר הַקָּרֵ֖ב יוּמָֽת׃

And those that were to pitch before the tabernacle eastward, before the tent of meeting toward the sunrising, were Moses, and Aaron and his sons, keeping the charge of the sanctuary, even the charge for the children of Israel; and the common man that drew nigh was to be put to death.

Targum Jonathan on Numbers