Psalms 109:24

My knees are weak through fasting - That hunger is as soon felt in weakening the knees, as in producing an uneasy sensation in the stomach, is known by all who have ever felt it. Writers in all countries have referred to this effect of hunger. Thus Tryphioderus Il. Excid. ver 155:

Τειρομενου βαρυθειεν ατερπεΐ γουνατα λιμῳ .

"Their knees might fail, by hunger's force subdued;

And sink, unable to sustain their load."

Merrick.