Joanne Case (personal communication, 17 May 2004) wonders if the adverbial before is missing an object or if before is an error for forth. The expression “to drive forth” occurs 12 times in the Book of Mormon text, as in the following two examples where the context is similar to that found in Mosiah 12:5:
Although forth is possible in Mosiah 12:5, there is no textual evidence in the manuscripts or editions for forth and before ever being mixed up.
This example of before in Mosiah 12:5 is the only one in the entire Book of Mormon text where adverbial before is used to refer to space rather than time. The King James Bible, however, has a number of examples of before being used this way with the motion verbs go and run (but none with drive), as in these two examples:
Despite its uniqueness, the usage in Mosiah 12:5 is perfectly fine. There is no need to emend before by adding an object or by replacing before with forth.
Summary: Maintain in Mosiah 12:5 the adverbial before; such usage is fairly common in the King James Bible, but it is not found elsewhere in the Book of Mormon text.