Helaman 4:14

But behold, Moronihah did preach many things unto the people, because of their iniquity, and also Nephi and Lehi, which were the sons of Helaman, did preach many things unto the people; yea, and did prophesy many things unto them concerning their iniquities, and what should come unto them if they did not repent of their sins.

But Moronihah preached many things to the people about their sins. Nephi and Lehi, the sons of Helaman, also preached many things to the people. They told them about their sins. They told them what would happen if they did not stop sinning.

But Moronihah preached to the people about their sins, and so did Nephi and Lehi, Helaman’s sons. They warned the people about what would happen if they didn’t turn from their wickedness.