You shall make them as a fiery oven in the time of your anger: the LORD shall swallow them up in his wrath, and the fire shall devour them.
All Commentaries on Psalms 21:9 Go To Psalms 21
Augustine of Hippo
AD 430
10. "Thou shalt make them like a fiery oven:" Thou shalt make them on fire within, by the consciousness of their ungodliness: "In the time of Thy countenance:" in the time of Thy manifestation. "The Lord shall trouble them in His wrath, and the fire shall devour them" (ver. 9). And then, being troubled by the vengeance of the Lord, after the accusation of their conscience, they shall be given up to eternal fire, to be devoured.