Alma 51:32

And it came to pass that they did harrass them, insomuch that they did slay them even until it was dark. And it came to pass that Teancum and his men did pitch their tents in the borders of the land Bountiful; and Amalickiah did pitch his tents in the borders on the beach by the seashore: and after this manner were they driven.

They attacked them and killed them until it was dark. Teancum and his men set up their tents in the borders of the land Bountiful. Amalickiah set up his tents on the beach by the ocean. This is how they were pushed back.

They harassed the Lamanites all day, killing them until darkness fell. That night Teancum and his men camped on the borders of Bountiful. Amalickiah camped on the beach by the shore. That’s where the day’s fighting left them.