Moses
Numbers 14:38ESV·traditional attribution

Of those men who went to spy out the land, only Joshua the son of Nun and Caleb the son of Jephunneh remained alive.

Matthew Henry Presbyterian @wholebiblehenry

Here is, I. The sudden death of the ten evil spies. While the sentence was passing upon the people, before it was published, they died of the plague before the Lord, Num 14:36, Num 14:37. Now, 1. God hereby showed his particular displeasure against those who sinned and made Israel to sin. (1.) They sinned themselves, in bringing up a slander upon the land of promise.

Commenting on Numbers 14:36-45

John Gill Reformed Baptist @doctorgill

And Moses told these sayings unto all the children of Israel,.... That all that had murmured, who were of twenty years old and upwards, should die in the wilderness, and never see nor enter into the land of Canaan, on the borders of which they now were: and the people mourned greatly; because of their unhappy case, that they should be cut off by death...

Keil & Delitzsch Lutheran @keilanddelitzsch

Num 14:36-38 But for the purpose of giving to the whole congregation a practical proof of the solemnity of the divine threatening of punishment, the spies who had induced the congregation to revolt, through their evil report concerning the inhabitants of Canaan, were smitten by a “stroke before Jehovah,” i.e., by a sudden death, which proceeded in a visible manner from Jehovah Himself, whilst Joshua and Caleb remained alive.

Commenting on Numbers 14:36-38