'Fat' in the Bible

‘They are fat and they are sleek (prosperous),They excel in acts of wickedness;They do not plead the cause,The cause of the orphan, so that they [the wicked] may prosper,And they do not defend the rights of the poor.

For thus says the Lord in regard to the house of the king of Judah:“You are [as valuable] to Me as [the green pastures of] Gilead [east of the Jordan]Or as the [plentiful] summit of Lebanon [west of the Jordan],Yet most certainly [if you will not listen to Me] I will make you a wilderness,And uninhabited cities.