What was the relationship between Shem and Japheth?
Shem and Japheth together covered their father with a cloak, without looking at him. Genesis 9:23
What the Bible says
Genesis 9:23
But Sem and Japheth put a cloak upon their shoulders, and going backward, covered the nakedness of their father: and their faces were turned away, and they saw not their father’s nakedness.
Douay-Rheims Bible (Challoner revision), public domain.