Moses
Deuteronomy 1:27ESV·traditional attribution

And you murmured in your tents and said, ‘Because the LORD hated us he has brought us out of the land of Egypt, to give us into the hand of the Amorites, to destroy us.

John Calvin Reformed @genevareformer

27. And ye murmured in your tents. Elsewhere he says that they also wept; here he only speaks of their murmuring, which better suited his reproof. He then reminds them how malignant had been their ingratitude and perversity in upbraiding God on account of the special blessing which He had conferred upon them, as if He had done them a grievous injury.

Matthew Henry Presbyterian @wholebiblehenry

Moses here makes a large rehearsal of the fatal turn which was given to their affairs by their own sins, and God's wrath, when, from the very borders of Canaan, the honour of conquering it, and the pleasure of possessing it, the whole generation was hurried back into the wilderness, and their carcases fell there. It was a memorable story; we read it Num.

Commenting on Deuteronomy 1:19-46

John Gill Reformed Baptist @doctorgill

And ye murmured in your tents,.... Not in a private manner; for though the murmurs began there, they having wept all night after the report of the spies; yet it became general and public, and they gathered together in a body, and openly expressed their murmurs against Moses and Aaron, Num 14:1, and said, because the Lord hated us, he hath brought us forth out...