Numbers 27:20

ונתתה מהודך עליו AND THOU SHALT PUT SOME OF THY GLORY UPON HIM — This refers to the shining of the skin of his countenance (see Exodus 34:29—30). מהודך SOME OF THY GLORY, and not all thy glory; consequently we learn from this: Moses’ face beamed like the sun, Joshua's face only like the moon (Sifrei Bamidbar 140:2; Bava Batra 75a). למען ישמעו כל עדת ישראל THAT ALL THE CONGREGATION OF THE CHILDREN OF ISRAEL SHOULD BE OBEDIENT TO HIM — that they should comport themselves towards him with respect and reverence, in the same way as they comport themselves towards you (cf. Yalkut Shimoni on Torah 776).

וְנָתַתָּ֥ה מֵהֽוֹדְךָ֖ עָלָ֑יו לְמַ֣עַן יִשְׁמְע֔וּ כׇּל־עֲדַ֖ת בְּנֵ֥י יִשְׂרָאֵֽל׃

And thou shalt put some of thy honour upon him, that all the congregation of the children of Yisra᾽el may be obedient.