From my grandmother’s Catholic Bible.
Leave not the reading of the Scriptures to the ignorant, lest they rest their own destruction.
For the record, I have just checked my great-grandparents Bible, published 1874, imprimatur Archbishop of Philadelphia, and the Bible my grandfather gave my grandmother for their engagement, imprimatur Cardinal Gibbons of Baltimore in 1890.
Neither on has the phrase you quote.
Just for the record of this thread.