Moses
Numbers 14:37ESV·traditional attribution

the men who brought up a bad report of the land—died by plague before the LORD.

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

But Joshua the son of Nun, and Caleb the son of Jephunneh,.... Here Joshua is set first, as Caleb is in Num 14:30; which shows that they were equal in dignity, and therefore are indifferently put, sometimes the one first, and sometimes the other: which were of the men that went to search the land; were two of the spies, and were for the tribes...

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