If I have seen any perish … - He turns to another virtue of the same general class - that of providing for the poor. The meaning is clear, that he had always assisted the poor and needy.
Matthew Henry
Concise Bible Commentary
Job's conscience gave testimony concerning his just and charitable behaviour toward the poor. He is most large upon this head, because in this matter he was particularly accused. He was tender of all, and hurtful to none. Notice the principles by which Job was restrained from being uncharitable and unmerciful. He stood in awe of the Lord, as certainly against him, if he should wrong the poor. Regard to worldly interests may restrain a man from actual crimes; but the grace of God alone can make him hate, dread, and shun sinful thoughts and desires.