John Gill Commentary Ezekiel 7:17

"All hands shall be feeble, and all knees shall be weak as water." — Ezekiel 7:17 (ASV)

All hands shall be feeble No strength in them, to lay hold on weapons of war to defend themselves, or fight the enemy; no heart nor courage in them, to go forth and meet him; and even afraid to lift up their voice in mourning, lest they should be heard, and pursued, and taken.

and all knees shall be weak [as] water; tremble and beat one against another, for fear of the enemy; or, "shall flow with water," as the Targum; either with sweat or urine, which are sometimes both caused by fear.