Psalm 22:14 describes bones out of joint and heart melting, paralleling the physical weakness and wasting here.

Psalm 102:4 mentions forgetting to eat and a withered heart, closely matching the fasting and gauntness here.

Psalm 69:10 also links fasting with physical affliction and reproach, reinforcing the psalmist's experience of weakness from fasting.

Psalm 35:13 also mentions fasting and sackcloth in a context of intercession, linking to the fasting that causes weakness here.

Job 19:20 describes bones clinging to skin, an identical image of extreme emaciation as here.

Hebrews 12:12 uses the exact phrase 'weak knees' to encourage strengthening, directly echoing the physical condition described here.

2 Corinthians 11:27 lists hunger and deprivation among Paul's hardships, paralleling the physical toll of fasting here.