Then you can provide the Scripture to support the claims of the apparition claiming to be Mary regarding this:
Whosoever dies clothed in this Scapular shall not suffer eternal fire.
http://www.fatima.org/apostolate/pdf/brown_scapular.pdf
The Church allows, but does not require or speak infallibly about such apparitions. Many Catholics do believe in Fatima and the promises about the scapular, (which I believe was given in another apparition). Many are skeptical. Both are allowed.
PLEASE UNDERSTAND THAT CATHOLICS ARE REQUIRED TO BELIEVE THE TEACHINGS OF THE CHURCH AS TAUGHT BY SOME COUNCILS AND RATIFIED BY THE POPE. THEY ALSO HAVE TO BELIEVE IN TWO INFALLIBLE STATEMENTS BY THE POPE ABOUT MARY.
Apparently this report was passed down over the years but this was not an official doctrine of the Catholic Church.
Were the Carmelites of old “fibbing” about the brown scapular?
No, they firmly believed the origin story handed down to them. It’s taken centuries of historical research to sort out fact from pious fiction, and for centuries the pious fiction was passed on as God’s truth (literally).
http://www.catholic.com/blog/michelle-arnold/the-sign-of-the-scapular
On web site: http://www.fatima.org/apostolate/pdf/brown_scapular.pdf
The great personal reward one may receive is The
Sabbatine (or SATURDAY) Privilege and is based on a
Papal bull issued on March 3, 1322, by Pope John XXII.
The privilege is frequently understood to mean that
those who wear the Scapular and fulfill two other conditions (which, according to the only copy of the bull in existence, were made by the Blessed Virgin Mary in an apparition to Pope John XXII) will be FREED FROM PURGATORY ON THE FIRST SATURDAY AFTER DEATH.
However, all that the Church has ever said officially
in explanation of this, on several occasions, is that those who fulfill the conditions of the Sabbatine Privilege will be released from purgatory, through the intercession of Our Blessed Lady, SOON after death, and ESPECIALLY ON SATURDAY.
The scapular does not protect one that dies in sin.
Why limit it to Scripture?