Job 33:15

In a dream: this he mentions, as the usual way of God's revealing his mind and will to men in those days, before God's word was committed to writing, as Genesis 20:6, Genesis 41:1,28. In a vision of the night: this is added by way of explication and limitation, to show that he speaks not of every dream, but of those Divine dreams in which God was pleased to vouchsafe some vision or representation of his will to the mind of a man. When deep sleep falleth upon men; when men's senses are bound up, and their minds free from all distracting cares and business of the world, and wholly at leisure to receive Divine impressions. In slumberings: this is added, because in this case the man is like one that slumbereth, or between sleeping and waking, or uncertain in which state he is, as Paul could not tell whether he was in the body, or out of the body, when he was in his ecstasy, 2 Corinthians 12:1,2.