וַיַּ֜עַן יְהוֹשֻׁ֣עַ בִּן־נ֗וּן מְשָׁרֵ֥ת מֹשֶׁ֛ה מִבְּחֻרָ֖יו וַיֹּאמַ֑ר אֲדֹנִ֥י מֹשֶׁ֖ה כְּלָאֵֽם׃
And Joshua the son of Nun, the minister of Moses from his youth up, answered and said: ‘My lord Moses, shut them in.’
Read kabbalistic (mystical) interpretation of Numbers 11:28: and classical mystical sources.