Apostolic Constitutions
A collection of early Christian canon law and liturgy, attributed to Clement of Rome though likely compiled in the 4th century.
Chapter I (The Six Days of Creation)
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Verse 26: Let Us Make Man in Our Image and Likeness
— Quoted (Book VII, ch. 35) on man as the culmination of God's work, body from four elements, soul from nothing
"Beautifully, St. Clement, Book VII of the Apostolic Constitutions, chapter 35"