Moses
Deuteronomy 6:15ESV·traditional attribution

for the LORD your God in your midst is a jealous God—lest the anger of the LORD your God be kindled against you, and he destroy you from off the face of the earth.

Matthew Henry Presbyterian @wholebiblehenry

Here is, I. A brief summary of religion, containing the first principles of faith and obedience, Deu 6:4, Deu 6:5. These two verses the Jews reckon one of the choicest portions of scripture: they write it in their phylacteries, and think themselves not only obliged to say it at least twice every day, but very happy in being so obliged, having this saying among them...

Commenting on Deuteronomy 6:4-16

John Gill Reformed Baptist @doctorgill

For the Lord thy God is a jealous God among you,.... He was near to them, in the midst of them, his tabernacle being placed between their camps; and was a God jealous of his honour and glory in matters of worship, and would resent any affront given him in that way: lest the anger of the Lord thy God be kindled against thee; there...

Keil & Delitzsch Lutheran @keilanddelitzsch

Deu 6:14-16 The worship of Jehovah not only precludes all idolatry, which the Lord, as a jealous God, will not endure (see at Exo 20:5), but will punish with destruction from the earth (“the face of the ground,” as in Exo 32:12); but it also excludes tempting the Lord by an unbelieving murmuring against God, if He does not remove any kind of distress immediately...

Commenting on Deuteronomy 6:14-16