The gems of Revelation 21, page-309

by the mouth of all his holy prophets since the world began.
And those prophets are listed in the Bible :-
Ezekiel, Jonah, Moses, Malachi, the Apostles and many more.
Now please list where Bab, Muhammad, Buddha are listed as HOLY prophets
..
No doubt that people like Bab, Buddha, Ellen G White etc experienced/visioned 'SOMETHING'
But you'll need to convince yourself that what they 'experienced' is PRIVATE revelation from God
..
1Now concerning spiritual gifts, brethren, I would not have you ignorant.
1 Cor ch's 12-14 destroys modern day self-claimed 'prophets'