John Gill Commentary Genesis 41:12

"And there was with us there a young man, a Hebrew, servant to the captain of the guard; and we told him, and he interpreted to us our dreams; to each man according to his dream he did interpret." — Genesis 41:12 (ASV)

And [there was] there with us a young man Who was in the prison with them, had the care of them, and waited upon them; he was then about twenty eight years of age; for it was two years ago he speaks of, and Joseph was thirty when he stood before Pharaoh, (Genesis 41:46) : an Hebrew servant to the captain of the guard ; he first describes him by his age, a young man, then by his descent, an Hebrew, and by his state and condition, a servant; neither of them tended much to recommend him to the king: and we told him ; that is, their dreams: and he interpreted to us our dream, to each man according to his dreamdid he interpret ; told them what their dreams presignified, what the events would be they portended; the interpretation was different according to their dreams.