João 6:58

In conclusion, Jesus returned to His initial claim that He had come from the Father (John 6:29). The Jews often substituted the term "heaven" for "God" out of respect for God’s name, and Jesus did that here. This is a figure of speech called metonymy in which the speaker or writer uses the name of one thing for that of another associated with or suggested by it. The Israelites who ate the physical bread that came down from God died in the wilderness (John 6:30-31), but those who believe in the spiritual Bread that came down from Him will live forever.