We don't pray to the dead.
We pray that God may have mercy on the souls of those who have departed the life on earth, and we pray for mercy on the souls of those who are still living on earth.
We also ask the saints to pray for us, as we ask of our congregations to pray for us.
There is no death in those who are in Christ.
Your tagline speaks of the Jews whose sciptures did not reveal that. If they could have received the full truth from the OT, there would have been no need for the new one (cf Hebrews).
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