Gregory the Dialogist

Call now, if there be any that will answer thee. For Almighty God often passes by the prayer of that man in his trouble, who slights His precepts in the season of rest. Hence it is written, He that turneth away his ear from hearing the law, even his prayer shall be abomination. Now for us 'to call,' is to beseech God with humble prayer; but for God to 'answer,' is to vouchsafe an accomplishment to our prayers; and so he says, Call now, if any will answer thee. …

Morals on the Book of Job, Book V ↗

Thomas Aquinas

So after Eliphaz has explained his revelation, since Job could not have believed this revelation, he adds, "Call now; is there anyone who will answer you?" as if to say: If you do not believe that this was revealed to me, you yourself can invoke God, if perhaps he himself will answer this doubt for you. If through your own merits you do not think you can obtain this from God, "Turn to one of the holy men," so that by his mediation you will be able to know the truth from God about this matter. …

Commentary on Job ↗