Moses
Deuteronomy 17:7ESV·traditional attribution

The hand of the witnesses shall be first against him to put him to death, and afterward the hand of all the people. So you shall purge the evil from your midst.

John Calvin Reformed @genevareformer

7. The hands of the witnesses shall be first. It was not without reason that God would have criminals put to death by the hand of those by whose testimony they were condemned. The ancient people did not employ public executioners, that there might be more solemnity, modesty, and reverence in the infliction of punishments.

Matthew Henry Presbyterian @wholebiblehenry

Here is, I. A law for preserving the honour of God's worship, by providing that no creature that had any blemish should be offered in sacrifice to him, Deu 17:1. This caveat we have often met with: Thou shalt not sacrifice that which has any blemish, which renders it unsightly, or any evil matter or thing (as the following word night better be rendered), any...

Commenting on Deuteronomy 17:1-7

John Gill Reformed Baptist @doctorgill

The hands of the witnesses shall be first upon him to put him to death,.... Of everyone of them, as Aben Ezra; they were to cast the first stone at him, which would be a further trial and confirmation of their testimony; for if they readily and without reluctance first began the stoning of the idolater, it would not only show their zeal for the...