How long will you imagine evil against a man? you shall be slain all of you: as a leaning wall shall you be, and as a tottering fence.
Read Chapter 62
Augustine of Hippo
AD 430
2. Therefore, down from the higher place fortified and protected, he, to whom the Lord hath been made a refuge, he, to whom is God Himself for a fortified place, hath regard to those whom he hath leaped over, and looking down upon them speaketh as though from a lofty tower: for this also hath been said of Him, "A Tower of strength from the face of the enemy:" he giveth heed therefore to them, and saith, "How long do ye lay upon a man?" (ver. 3). By insulting, by hurling reproaches, by laying wait, by persecuting, ye lay upon a man burthens, ye lay upon a man as much as a man can bear: but in order that a man may bear, under him is He that hath made man. If to a man ye look, "slay ye, all of you." Behold, lay upon, rage, "slay ye, all of you." "As though a wall bowed down, and as a fence smitten against;" lean against, smite against, as if going to throw down. And where is, "I shall not be moved more"? But wherefore? "I shall not be moved more." Because Himself is God my Saving One, my ...
Fence. This may refer to the persecutors, who resembled a leaning wall. (Berthier) (Isaias xxx. 13.) (Calmet)
Protestants, "ye shall be slain all of you, as a bowing wall shall ye be "He threatens them with speedy destruction, (Haydock) or represents to them the baseness of attacking a man ready to fall. (Calmet)
He informs them, that their attempts will be in vain, though they be very numerous, and he himself apparently so weak. (Worthington)