The Catechism of the Catholic Church references many such elements of Apostolic belief, observance and practice. You'll need to use their search function. Try keyword TRADITION.
Let me respectfully re-direct your attention to my analogy about the family's Thanksgiving Dinner traditions. A lot of it is not in what we "write." A lot of it is in what we "do."
You may need to spend more time in the 1st, 2nd, and 3rd century Christians ("Apostolic" or "Ante-Nicene" Fathers) to perceive what they did and we still do. Justin Martyr and the Didache are good places to begin. Plus Ignatius of Antioch (second bishop of Antioch, succeeded Peter) of course; and Polycarp, too, his friend, who was, with him, as disciple of St John.
Certainly a beautiful summary of Christianity, as expressed in the Scriptures!
I believe in God, the Father almighty,
creator of heaven and earth.I believe in Jesus Christ, God’s only Son, our Lord,
who was conceived by the Holy Spirit,
born of the Virgin Mary,
suffered under Pontius Pilate,
was crucified, died, and was buried;
he descended to the dead.
On the third day he rose again;
he ascended into heaven,
he is seated at the right hand of the Father,
and he will come to judge the living and the dead.I believe in the Holy Spirit,
the holy catholic and apostolic Church,
the communion of saints,
the forgiveness of sins,
the resurrection of the body,
and the life everlasting. Amen.
1. Can you point to a phrase or belief in the Apostle's Creed that doesn't appear in Scripture, but depends on tradition?
2. Also, since this was not written during the time of the Apostles, we know it is not what Paul referred to in the passages about tradition. What specific traditions did Paul refer to?