The author of the Book of Mormon tried hard to make it sound like the King James Bible. Way too hard, in fact. Here's what Mark Twain said about it:

Wherever he found his speech growing too modern -- which was about every sentence or two -- he ladled in a few such Scriptural phrases as "exceeding sore," "and it came to pass," etc., and made things satisfactory again.

Exceedingly

1:7, 10(2), 23, 28, 40, 43, 45

Mark Twain's Look at Mormonism (Roughing It)