From the early Church Fathers to now.
1 Jewish · 2 Reformed
“Let not him that bendeth, bend his bow, and let not, him go up that is armed with a coat of mail: spare not her young men, destroy all her army.”
“To...the archer shall bend This is an elliptical verse. [The meaning is:] To wherever I say, there the archer shall bend his bow. and he shall not be healed with his coat of mail Heb. וְאַל יִתְעַל.”
“Against him that bendeth let the archer bend his bow,.... These are either the words of the Lord to the Medes and Persians, to the archers among them, to bend their bows and level their arrows against the Chaldeans, who had bent their bows and shot their arrows against others; or of the Medes and Persians stirring up one another to draw their bows, and fight manfully against the enemy: and against him that lifteth up himself in his brigandine; or coat of mail; that swaggers about in it, proud of it, and putting his confidence in it, as if out of all danger. The sense is, that they should direct their arrows both against those that were more lightly or more heavily armed; since by them they might do execution among the one and the other: and spare ye not her young men; because of their youth, beauty, and strength: destroy ye utterly all her host; her whole army, whether officers or common soldiers; or let them be accoutred in what manner they will. The Targum is, "consume all her substance.''”
“Against him that bendeth--namely, the bow; that is, the Babylonian archer. let the archer bend--that is, the Persian archer (Jer 50:4). The Chaldean version and JEROME, by changing the vowel points, read, "Let not him (the Babylonian) who bendeth his bow bend it." But the close of the verse is addressed to the Median invaders; therefore it is more likely that the first part of the verse is addressed to them, as in English Version, not to the Babylonians, to warn them against resistance as vain, as in the Chaldean version. The word "bend" is thrice repeated: "Against him that bendeth let him that bendeth bend," to imply the utmost straining of the bow.”
The in-app commentary runs from the Fathers to the early-modern record, then stops — that's where the public-domain sources end, not where the reading does. For the modern reading, follow the sources directly.