The bible is the foundation of God's words to the world.
Maybe a more accurate question with that in mind is, where is the Roman Rite Catholic church sustained in its rites and rituals in the bible?
Where are we told to implore the dead to beseech God to answer our prayers?
Where are we told to venerate Jesus' mother as co-redemptrix and intercessor?
Where are we told to sprinkle infants and thus "baptize" them into the church?
Where are we told the dead in Christ enter a place called purgatory? But may be freed early through the payment if indulgences to the church. Where is that found in scripture.
Where are we told we must confess our sins to a priest, commit to the penance he decides appropriate, because he has the authority to forgive sins?
Why did the RRCC omit redemption of the sinner by their asking God to forgive their sins when they first come to Christ in faith , that they are then reborn as a new creation in Christ, that God remembers their sins no more.
Where instead is it written the faithful have to repent their sins to a priest and receive forgiveness, or they are in danger of losing their salvation?
Where is it written a Christian need receive last rites?
Before the last Pope decreed it closed, where was the scripture that sustained the existence of a place called, Limbo? And where is it written that God would change his mind about that place and close it?
Where is it written that statuary dedicated to those dead in the RRCC and elected to the status of Saint, are to be memorialized as idols, statuary, and erected in the church?
Where is it written we should pray to them?
Where are "holy relics" affirmed in the Bible.
Where is the office of Pope, in scripture. Where is Papal Infallibility described in scripture?
Are you, in the OP query, asking for answers derived from the 66 books of the bible? Or the 73?
I don’t think limbo is a doctrine
It’s simply the state of I baptized babies who die, they are in the mercy of God, but cannot go to heaven cos of original sin, jn 3:5 Must be born again by Christian baptism water and the spirit
infant baptism acts 2:38-39
This promise (Gods promise is a sacred oath also known as a sacrament) ez 36:25-27 Christian baptism is to your children also
in the church the communion of saints
They are alive not dead and pray for us
Rev 5:8
John 11:25
Jesus said unto her, I am the resurrection, and the life: he that believeth in me, though he were dead, yet shall he live: