You posted: Where in the Holy Scriptures is Purgatory described, or mentioned?
The fact is, as I showed in 31, it is described in 1 Cor 3:9-15. But why did you ask? Let is say the Church teaches some other thing never mentioned or described in the Holy Scripture; what of it? Where does this rule itself in the scripture? I know the Holy Scripture says that it is inspired by God, that it is necessary for the formation of a Christian, must not be tempered with, and that it is good to test any proposition on faith and morals against it. Where does it say that the Church MUST NOT teach anything not in it?
Sorry.
The Apostle Paul writes;
Cyril of Jerusalem (A.D. 315-386);
NPNF2, Vol. 7,Cyril of Jerusalem, Catechetical Lectures 4:17