Alma 62:19

Now Moroni was desirous that the Lamanites should come out to battle against them, upon the plains; but the Lamanites knowing of their exceeding great courage, and beholding the greatness of their numbers, therefore they durst not come out against them; therefore they did not come to battle in that day.

Moroni wanted the Lamanites to come out and fight them on the plains. But the Lamanites knew about their great courage. They saw how many soldiers they had. So they did not dare come out against them. They did not come to battle that day.

Moroni wanted the Lamanites to come out and fight in the open. But the Lamanites knew how fierce the Nephites were and saw how many of them there were, so they didn’t dare come out that day.