Paul Thomas (personal communication) has suggested that in Alma 40:26 there seems to be an unnecessary repetition of the plural word things; perhaps the text should read something like “for they die as to things pertaining to righteousness”. However, such repetition of things is found elsewhere in the text:
An example with the same basic phraseology as in Alma 40:26, “pertaining (un)to things of righteousness”, is found in a revelation of Joseph Smith’s dating from May 1829:
There is no need to emend Alma 40:26; the repetition of the word things is fully intended.
Summary: Accept in Alma 40:26 as well as in 1 Nephi 22:3 the repetitious occurrence of things in the phrase “things pertaining to things” (the reading in 𝓞 for both cases).