It's comunicated through the entirety of the gospels. Since you've read the Bible so many times perhaps you could point out where it's ever mentioned that jesus' phisical blood has magical powers?
"For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life."
How does that make it clear that biblical references to the blood of Jesus are references to the sacrifice He made on the cross?
