[353FMG]

>I’m looking for a revelation of the basis for this doctrine in the Holy Scriptures, but thus far to no avail.<

.
You didn’t look at all three sources on which the teachings of the Catholic Church is based: (1) Sacred Scripture, (2) Sacred Tradition, (3) Magisterium.

Try searching in (2) and (3).

[Elsiejay]

But those are inventions of human origins.