John Chrysostom
"Without mercy," he says. There was no indulgence there, no mercy, although it was the Law of Moses, which prescribed many things. What does "on the testimony of two or three witnesses" mean? When, he says, two or three people testified, the guilty were at once subjected to punishment. If in the Old Covenant such a punishment was appointed when someone rejected the Law of Moses, how much more here? Therefore he says: "Of how much worse punishment, do you think, will he be thought worthy who has trampled the Son of God underfoot, counted the Blood of the covenant by which he was sanctified a common thing, and insulted the Spirit of grace?" (Heb 10:29).