Moses
Exodus 19:21BSB·traditional attribution

and the LORD said to him, “Go down and warn the people not to break through to see the LORD, lest many of them perish.

John Calvin Reformed @genevareformer

21. And the Lord said unto Moses. By God’s command the same prohibition is repeated, that the people should not pass over the bounds, because, without doubt, it was not enough to have forbidden them once, as we may gather from the reply of Moses; for he thought that since they were all admonished, there was no necessity for a new prohibition.

Matthew Henry Presbyterian @wholebiblehenry

Now, at length, comes that memorable day, that terrible day of the Lord, that day of judgment, in which Israel heard the voice of the Lord God speaking to them out of the midst of the fire, and lived, Deu 4:33. Never was there such a sermon preached, before nor since, as this which was here preached to the church in the wilderness. For, I.

Commenting on Exodus 19:16-25

John Gill Reformed Baptist @doctorgill

And the Lord said unto Moses, go down,.... As soon as he was got to the top of the mount he was bid to go down again to the bottom, with a message to the people: charge the people, lest they break through unto the Lord to gaze; to see if they could observe any similitude or likeness of God, that they might have an...