Moses
Numbers 13:18ESV·traditional attribution

and see what the land is, and whether the people who dwell in it are strong or weak, whether they are few or many,

John Calvin Reformed @genevareformer

18. And see the land what it is. The counsel of Moses had this object, that the people might be made aware how rich and fertile the land was; for a barren country does not support a large population; and the healthfulness of a locality is inferred from the rigor of its inhabitants, tie, therefore, chiefly insists on the goodness of the land and its abundant production of fruits.

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

The place was called the brook of Eshcol,.... That is, in later times: because of the cluster of grapes which the children of Israel cut down from thence; the word "Eschol" signifying a "cluster"; and this cluster was typical of Christ, who may be compared to this, as he is to a cluster of camphire, Sol 1:14; there being in him a "cluster" of all...