Moses
Numbers 16:12ESV·traditional attribution

And Moses sent to call Dathan and Abiram the sons of Eliab, and they said, “We will not come up.

John Calvin Reformed @genevareformer

12. And Moses sent to call Dathan and Abiram. He desired, in this way, if it might be, by his holy admonitions, to withhold them from that destruction, on which they were rushing. Therefore he ceased not to provide for their welfare, though he had thus far experienced that they were altogether in a desperate state.

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

And Moses sent to call Dathan and Abiram, the sons of Eliab,.... He sent messengers to call them to the house of judgment, as the Targum of Jonathan, to the court of judicature, where the Jews suppose Moses, with the seventy elders, were now sitting: it seems these two men departed either before.