Psalm 89:43 New English Translation

⁴³You turn back^[a] his sword from the adversary,^[b]
and have not sustained him in battle.^[c]

Psalm 89:43 tn The perfect verbal form predominates in vv. 38-45. The use of the imperfect in this one instance may be for rhetorical effect. The psalmist briefly lapses into dramatic mode, describing the king’s military defeat as if it were happening before his very eyes.
Psalm 89:43 tc Heb “you turn back, rocky summit, his sword.” The Hebrew term צוּר (tsur, “rocky summit”) makes no sense here, unless it is a divine title understood as vocative, “you turn back, O Rocky Summit, his sword.” Some emend the form to צֹר (tsor, “flint”) on the basis of Josh 5:2, which uses the phrase חַרְבוֹת צֻרִים (kharvot tsurim, “flint knives”). The noun צֹר (tsor, “flint”) can then be taken as “flint-like edge,” indicating the sharpness of the sword. Others emend the form to אָחוֹר (ʾakhor, “backward”) or to מִצַּר (mitsar, “from the adversary”). The present translation reflects the latter, assuming an original reading תָּשִׁיב מִצָּר חַרְבּוֹ (tashiv mitsar kharbo), which was changed to תָּשִׁיב צָר חַרְבּוֹ (tashiv tsar kharbo) by virtual haplography (confusion of bet/mem is well-attested) with צָר (tsar, “adversary”) then being misinterpreted as צוּר in the later tradition.
Psalm 89:43 tn Heb “and you have not caused him to stand in the battle.”

New English Translation (NET)