Here Joseph Smith once more removed the biblical use of the auxiliary do. Such editing was never applied consistently; thus we find, for instance, an unedited example of “do set” in Helaman 12:6 (“they do set at naught his counsels”). The critical text will restore all cases of the auxiliary do when supported by the earliest textual sources. For further discussion, see 1 Nephi 2:14 or, more generally, under do auxiliary in volume 3.
Summary: Restore the biblical phraseology “do set” here in 1 Nephi 19:7 since the earliest text reads this way.