Alma 20:2

And the voice of the Lord came to Ammon saying:

“Thou shalt not go up to the land of Nephi, for behold, the king will seek thy life; but thou shalt go to the land of Middoni; for behold, thy brother Aaron, and also Muloki and Ammah are in prison.”

From section: Ammon and Lamoni’s Plan

From page: Mission to the Lamanites