What was the relationship between Noah and Shem?
Shem was one of the three sons of Noah. Noah blessed the Lord, the God of Shem. Genesis 6:10; Genesis 9:26
What the Bible says
Genesis 6:10
And he begot three sons, Sem, Cham, and Japheth.
Genesis 9:26
And he said: Blessed be the Lord God of Sem, be Chanaan his servant.
Douay-Rheims Bible (Challoner revision), public domain.