Albert Barnes Commentary Job 24:9

"There are that pluck the fatherless from the breast, And take a pledge of the poor;" — Job 24:9 (ASV)

They pluck the fatherless from the breast — That is, they steal away unprotected children and sell them, or make slaves of them for their own use. If this is the correct interpretation, then there existed at that time, as has existed since, much to the disgrace of mankind, the custom of kidnapping children and carrying them away to be sold as slaves. Slavery existed in early ages, and it must have been in some such way that slaves were procured. Job’s wonder is that such people were permitted to live—that God did not come forth and punish them. The fact still exists, and the ground for wonder is not diminished.

Africa bleeds under wrongs of this kind; and the vengeance of heaven seems to sleep, though the child is torn away from its mother and conveyed, amid many horrors, to a distant land, to wear out life in hopeless servitude.

And take a pledge of the poor — That is, they take that which is therefore necessary for the comfort of the poor, and retain it, so that they cannot enjoy its use; see the notes at Job 22:6.