Moses
Numbers 25:10BSB·traditional attribution

Then the LORD said to Moses,

John Calvin Reformed @genevareformer

10. And the Lord spake unto Moses. In these words God makes it appear that He was the author of the death (of Zimri and Cozbi;) Added from Fr. not only because He was thus propitiated towards the people, but because He calls the zeal of Phinehas His own.

Matthew Henry Presbyterian @wholebiblehenry

Here is a remarkable contest between wickedness and righteousness, which shall be most bold and resolute; and righteousness carries the day, as no doubt it will at last. I. Never was vice more daring than it was in Zimri, a prince of a chief house in the tribe of Simeon.

Commenting on Numbers 25:6-15

John Gill Reformed Baptist @doctorgill

Phinehas, the son of Eleazar, the son of Aaron the priest,.... His descent and genealogy is observed as before, partly to show that he was not a private person, but a man of public authority that did the above fact; perhaps one of the judges that Moses ordered to slay every man his man, and therefore what he did by the order of the supreme...