'Weak' in the Bible

In arrogance, the wicked hunt down the weak. They are caught in the schemes that they devise.

"Because of the oppression of the weak and because of the groaning of the needy, I will now arise," says Yahweh; "I will set him in safety from those who malign him."

"Defend the weak, the poor, and the fatherless. Maintain the rights of the poor and oppressed.

Rescue the weak and needy. Deliver them out of the hand of the wicked."

My knees are weak through fasting. My body is thin and lacks fat.