'Leanness' in the Bible

“You have taken a firm hold on me and have shriveled me up,It has become a witness [against me];And my leanness [and infirmity] rises up [as evidence] against me,It testifies to my face [about my guilt].

So He gave them their request,But sent a wasting disease among them.

Therefore the Lord, the God of hosts, will send a wasting disease among the stout warriors of Assyria;And under his glory a fire will be kindled like a burning flame.