Job 31:13

If I did despise the cause of my man-servant - Job turns to another subject, on which he claimed that his life had been upright. It was in reference to the treatment of his servants. The meaning here is, “I never refused to do strict justice to my servants when they brought their cause before me, or when they complained that my dealings with them had been severe.”

When they contended with me - That is, when they brought their cause before me, and complained that I had not provided for them comfortably, or that their task had been too hard. If in any respect they supposed they had cause of complaint, I listened to them attentively, and endeavored to do right. He did not take advantage of his sower to oppress them, nor did he suppose that they had no rights of any kind. It is evident, from this, that Job had those who sustained to him the relation of servants; but whether they were slaves, or hired servants, is not known. The language here will agree with either supposition, though it cannot be doubted that slavery was known as early as the time of Job. There is no certain evidence that he held any slaves, in the proper sense of the term, nor that he regarded slavery as right; compare the notes at Job 1:3. He here refers to the numerous persons that had been in his employ in the days of his prosperity, and says that he had never taken advantage of his power or rank to do them wrong.