Malachi 4:2 (King James Bible) but unto you that fear my name shall the Sun of righteousness arise with healing in his wings
The 1830 edition has the plural healings, while the printer’s manuscript has the singular healing, which is also the King James reading. This plural is an error that seems to have been influenced by the visual similarity of the following plural wings (both end in -ing). This same error independently occurred in the 1892 RLDS edition. In neither case was the error transferred to subsequent editions.
Summary: Maintain the singular healing in 3 Nephi 25:2, the reading in 𝓟 as well as the corresponding reading in Malachi 4:2.