There is a strong tendency in the transmission of the Book of Mormon text for the third person singular ending -eth to be extended to other persons and numbers. In this example from 1 Nephi 12:9, scribe 2 of 𝓞 wrote “thou remembereth”. (Starting with 1 Nephi 12:9, scribe 2 took over for scribe 3.) It is possible that this use of -eth represents the actual original text, but it is more probable that this extension of the -eth ending was influenced by the preceding use of saith. For discussion, see 1 Nephi 11:2 as well as inflectional endings in volume 3.