1 Samuel 2:33-35

33 But Alma, with his guards, contended with the guards of the king of the Lamanites until he slew and drove them back.

34 And thus he cleared the ground, or rather the bank, which was on the west of the river Sidon, throwing the bodies of the Lamanites who had been slain into the waters of Sidon, that thereby his people might have room to cross and contend with the Lamanites and the Amlicites on the west side of the river Sidon.

35 And it came to pass that when they had all crossed the river Sidon that the Lamanites and the Amlicites began to flee before them, notwithstanding they were so numerous that they could not be numbered.