John Gill Commentary Job 28:20

"Whence then cometh wisdom? And where is the place of understanding?" — Job 28:20 (ASV)

From where then comes wisdom? and where [is] the place of
understanding ?
] The same questions as in (Job 28:12) ; repeated to set forth the superior excellency of wisdom, and to carry on the discourse, and lead on to other things concerning it. (See Gill on Job 28:12).