Good question. Scripture tells us we are edified by the prayers of our fellow believers. And no, prayers are not necessarily the same as mediation.
Regardless of the word used, nowhere in Scripture are we told to pray to dead people for intercession, for mediation, for edification, for fellowship, for anything. Nada. (And yes, I know those in heaven are not "dead" but alive in Christ.)
Even so, nowhere in Scripture are we told to pray to anyone other than the Triune God of all creation. On the contrary, we are told time and again not to pray to any part of the creation.
The Jews had this right -- pray to God alone. Rome continues to be in error regarding this Scriptural truth.
I might add... in the OT, the priest performed the office of mediation. He, and he alone, would go into the holy of holies, after rigorous purification, once a year to mediate between God and man. Jesus, with his death and resurrection, accomplished the same thing, but for all time. He, and he alone, is now our mediator, because he is the PERFECT sacrifice, and sits at God’s right hand.
That's all I wanted to know. Thanks.
How many books has your bible?