Jamieson, Fausset and Brown on Genesis 40:5-8

5-8. they dreamed a dream--Joseph, influenced by the spirit of true religion, could feel for others (Ec 4:1; Ro 12:15; Php 2:4). Observing them one day extremely depressed, he inquired the cause of their melancholy; and being informed it was owing to a dream they had respectively dreamed during the previous night, after piously directing them to God (Da 2:30; Is 26:10), he volunteered to aid them, through the divine help, in discovering the import of their vision. The influence of Providence must be seen in the remarkable fact of both officers dreaming such dreams in one night. He moves the spirits of men.