Ibn Ezra on Numbers 27:20/אבן עזרא על במדבר כ״ז:כ׳

1AND THOU SHALT PUT OF THY HONOR UPON HIM. You will honor Joshua in front of all of Israel.

2THAT…MAY HEARKEN. For Israel already believes in you. When they see that you honored Joshua they will respect him, for they will follow your ways.