What preacher in the Book of Alma said that everyone would be saved?
Nehor
He [Nehor] also testified unto the people that all mankind should be saved at the last day, and
that they need not fear nor tremble, but that they might lift up their heads and rejoice; for the Lord
had created all men, and had also redeemed all men; and, in the end, all men should have eternal life. Alma 1:4