If he turns not, he will whet his sword; he has bent his bow, and made it ready.
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Augustine of Hippo
AD 430
13. "Unless ye be converted," He says, "He will brandish His sword" (ver. 12). The Lord Man Himself may be taken to be God's double-edged sword, that is, His spear, which at His first coming He will not brandish, but hideth as it were in the sheath of humiliation: but He will brandish it, when at the second coming to judge the quick and dead, in the manifest splendour of His glory, He shall flash light on His righteous ones, and terror on the ungodly. For in other copies, instead of, "He shall brandish His sword," it has been written, "He shall make bright His spear:" by which word I think the last coming of the Lord's glory most appropriately signified: seeing that is understood of His person, which another Psalm has, "Deliver, O Lord, my soul from the ungodly, Thy spear from the enemies of Thine hand. He hath bent His bow, and made it ready." The tenses of the words must not be altogether overlooked, how he has spoken of "the sword" in the future, "He will brandish;" of "the bow" in ...
Except you. Hebrew, "if he be not. "Houbigant would read, "God will not be turned aside. "(Berthier)
"For him who does not change, he will sharpen his sword. "(St. Jerome) (Haydock)
God threatens before he strikes, (Calmet) expecting amendment. (Worthington)