Give them according to their deeds, and according to the wickedness of their endeavors: give them after the work of their hands; render to them what they deserve.
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Augustine of Hippo
AD 430
4. "Give unto them according to their works" (ver. 4). Give unto them according to their works, for this is just. "And according to the malice of their affections." For aiming at evil, they cannot discover good. "According to the works of their hands give Thou unto them." Although what they have done may avail for salvation to others, yet give Thou unto them according to the works of their wills. "Pay them their recompense." Because, for the truth which they heard, they wished to recompense deceit; let their won deceit deceive them.
Reward. He speaks prophetically, (ver. 5.) or of spiritual enemies. (Berthier)
"If they do not understand by kindness, make them understand by torments. "(St. Jerome)
He alludes to the calamities of the Babylonians, who had made such havoc, (Calmet) as well as to that of all who persecuted or rebelled against David. (Haydock)
His zeal prompts him to approve of their chastisement. (Worthington)