Jesus was not killed in Bethlehem as a baby, or in Galilee or Samaria as an adult. He couldn’t be, for it was necessary for him to die in Jerusalem, where Moriah is.
In the beginning I was the Word, and I as Word was the Beginning. By me all things were created, both in the heavens and in the earth, visible and invisible. All things have been created by me and for me (Colossians 1:16). Therefore, already in the opening word of the Hebrew Bible, Bereshith, I am.
The Bible of Jesus and the apostles was therefore the Old Testament. On the basis of these writings, they confessed the totality of who the Messiah is and what He does.