Rashi on Genesis 9:6/רש"י על בראשית ט׳:ו׳

1באדם דמו ישפך BY MAN SHALL HIS BLOOD BE SHED — If there are witnesses you kill him. Why? Because in the image of God [made He man] and he has destroyed the Divine image (Genesis Rabbah 34:14)

2עשה את האדם HE MADE MAN — This verse is abbreviated and should be “the Maker made man”; there are many similar expressions in the Scriptures.