Moses
Numbers 13:3BSB·traditional attribution

So at the command of the LORD, Moses sent them out from the Wilderness of Paran. All the men were leaders of the Israelites,

Matthew Henry Presbyterian @wholebiblehenry

Here we have, I. Orders given to send spies to search out the land of Canaan. It is here said, God directed Moses to send them (Num 13:1, Num 13:2), but it appears by the repetition of the story afterwards (Deu 1:22) that the motion came originally from the people; they came to Moses, and said, We will send men before us; and it was the fruit of their unbelief.

Commenting on Numbers 13:1-20

John Gill Reformed Baptist @doctorgill

And Moses, by the commandment of the Lord,.... By his power, permission, and leave, as Jarchi, that there might be no delay through his means: sent them from the wilderness of Paran; from Rithmah or Kadeshbarnea, which seem to be one and the same place in that wilderness: this, as before observed, was on the twenty ninth day of Sivan: See Gill on Num 13:1...

Jamieson-Fausset-Brown Reformed @jfbcommentary

those men were heads of the children of Israel--Not the princes who are named (Num 10:14-16, Num 10:18-20, Num 10:22-27), but chiefs, leading men though not of the first rank.