Moses
Numbers 16:21ESV·traditional attribution

“Separate yourselves from among this congregation, that I may consume them in a moment.”

John Calvin Reformed @genevareformer

21. Separate yourselves from among this congregation. Again does God declare that He will bear the people’s great impiety no longer, but will destroy them all to a man. Just, therefore, as he had commanded Lot to depart from Sodom, nay, had drawn him out by the hand of the angel, when He desired to destroy that city, so He now commands Moses and Aaron...

Matthew Henry Presbyterian @wholebiblehenry

Here is, I. The insolence of Dathan and Abiram, and their treasonable remonstrance. Moses had heard what Korah had to say, and had answered it; now he summons Dathan and Abiram to bring in their complaints (Num 16:12); but they would not obey his summons, either because they could not for shame say that to his face which they were resolved to say, and then...

Commenting on Numbers 16:12-22

John Gill Reformed Baptist @doctorgill

Separate yourselves, from among this congregation,.... Not only from Korah's company, but from the congregation of the children of Israel, whom Korah had got together, besides the two hundred fifty men that were at first with him; who by their words and behaviour, and particularly by their association and standing along with him, showed them to be on his side, which greatly provoked the Lord...