Numbers 18:3

וְשָֽׁמְרוּ֙ מִֽשְׁמַרְתְּךָ֔ וּמִשְׁמֶ֖רֶת כָּל־הָאֹ֑הֶל אַךְ֩ אֶל־כְּלֵ֨י הַקֹּ֤דֶשׁ וְאֶל־הַמִּזְבֵּ֙חַ֙ לֹ֣א יִקְרָ֔בוּ וְלֹֽא־יָמֻ֥תוּ גַם־הֵ֖ם גַּם־אַתֶּֽם׃

καὶ φυλάξονται τὰς φυλακάς σου καὶ τὰς φυλακὰς τῆς σκηνῆς· πλὴν πρὸς τὰ σκεύη τὰ ἅγια καὶ πρὸς τὸ θυσιαστήριον οὐ προσελεύσονεαν τᾶι, καὶ οὐκ ἀποθανοῦνται καὶ οὗτοι καὶ ὑμεῖς.

Greek text from Swete's edition, CC BY-SA 4.0

Y guardarán lo que tú ordenares, y el cargo de todo el tabernáculo: mas no llegarán á los vasos santos ni al altar, porque no mueran ellos y vosotros.

And they shall attend to your duties and to all the duties of the Tent; but they must not come near to the furnishings of the sanctuary or the altar, or both they and you will die.