Ezechiel 21:17

¹⁷ I jáť také tleskati budu rukama svýma, a doložím prchlivost svou. Já Hospodin mluvil jsem.

Knees weak as water

In Ezekiel 7:17, this signifies grief on account of the loss of the love of good. (Apocalypse Explained 677[7])