Jesus teaches us to pray to The Father, not to saints.
Pray then like this: Our Father in Heaven, hallowed be your name.
Matthew 6 verse 9
At the opening of how Jesus taught his disciples to pray he taught his disciples to pray to their Father in heaven, not to any saint in heaven.
For there is one God, and there is one mediator between God and men, the man Christ Jesus
1 Timothy 2 verse 5
Jesus is the one mediator between God and men. To ask a ‘Saint’ to mediate between us and God is to ask them to provide that only Jesus can.
And when the crowds saw what Paul had done, they lifted up their voices, saying, “The gods have come down to us in the likeness of men!” But when the apostles Barnabas and Paul heard of it, they tore their garments and rushed out into the crowd, crying out, “Men, why are you doing these things? We also are men, of like nature with you…”
Acts 14 verse 11 and 14 -15
Paul here is reaffirming that he and Barnabas are just regular people, not to be worshiped or prayed to, in life or in death.
For Christ has entered… into heaven itself, now to appear in the presence of God on our behalf.
Hebrews 9 verse 24
We do not have to pray to ‘Saints’, as Jesus is in heaven sitting at the right hand of God. Prayer in the Bible is only to God the Father or to God the Son. The idea of praying to saints was devised by the Roman Catholic Church and decreed at the Council of Trent in 1563.
praying at all times in the Spirit, with all prayer and supplication. To that end, keep alert with all perseverance, making supplication for all the saints
Ephesians 6 verse 16
Finally, we see here that Paul explicitly encourages believers in Ephesus to pray for the saints (the believers) not to pray to them.
Deeper Dive