Albert Barnes Commentary Job 21:28

"For ye say, Where is the house of the prince? And where is the tent wherein the wicked dwelt?" — Job 21:28 (ASV)

For ye say, Where is the house of the prince? - That is, you maintain that the house of the wicked man, in a high station, will be certainly overthrown. The parallelism, as well as the whole connection, requires us to understand the word “prince” here as referring to a “wicked” ruler. The word used (נדיב nâdı̂yb) properly means, one willing, voluntary, prompt; then, one who is liberal, generous, noble; then, one of noble birth, or of elevated rank; and then, as princes often had that character, it is used in a bad sense and means a “tyrant.” See Isaiah 13:2.

And where are the dwelling places of the wicked? - Margin, “tent of the tabernacles.” The Hebrew is, “The tent of the dwelling places.” The dwelling place was usually a “tent.” The meaning is, that such dwelling places would be certainly destroyed, as an expression of the divine displeasure.