Ether 15:16

And it came to pass that when it was night they were weary, and retired to their camps; and after that they had retired to their camps, they took up a howling and a lamentation for the loss of the slain of their people; and so great were their cries, their howlings and lamentations, that it did rend the air exceedingly.

When night came they were tired and went back to their camps. After they went back to their camps, they cried and screamed for the people who had died. Their cries and screams were so loud they filled the air.

When night came, they were exhausted and returned to their camps. Then they began wailing and mourning for their dead. Their cries and howls of grief pierced the air.