He would be born of the Seed of the woman. That’s in Genesis 3:15.
He would be a descendant of Shem. That’s in Genesis 9:26.
He would be of the seed of Abraham. That’s in Genesis 12:1-3.
He would be a descendant of Isaac. That’s in Genesis 22:18.
He would be a descendant of Jacob. That’s in Genesis 28:14.
He would be of the tribe of Judah. That’s in Genesis 49:10.
He would be a “son of David.” That’s in 2 Samuel 7:11,12,16.
He would be born of a virgin. That’s in Isaiah 7:14.
He would be born in Bethlehem. That’s in Micah 5:2.

1. They may have just thought they knew enough.