Here the compositor for the 1892 RLDS edition accidentally set the singular substance as a plural. He may have been influenced by the preceding plural goods. The 1908 RLDS edition restored the correct singular. There is one other passage in the history of the text where the plural substances has occurred, namely, in Mormon 8:37. In that passage, it appears that 𝓞 itself read substances, although this may be an error for substance. For discussion, see under that passage.
Summary: Maintain in 4 Nephi 1:25 the singular substance, the reading of the earliest text.