It's not about whether it is in "the catechism or the bible"....it's about telling the whole truth about what the Church teaches. There is no question that the Church teaches that "outside the Church there is no salvation". Pretty much every work of apologetics I have read addresses the issue and explains what the teaching really means.
Your line of argument is intellectually dishonest.
There’s no question that those who think that Catholic teaching goes beyond the catechism and the bible are wrong
The church doesn’t have any teaching that is unspoken unwritten and secret
Drop it
You are ignorant of the facts
And you are lying about the Church
There are no true books on apologetics which cite sources and teaching outside of the bible and the catechism ormake things up To do so is heretical
It’s why I am asking for the sentence and the source
Still not getting the answer