Alma 51:34

And it came to pass that Teancum stole privily into the tent of the king, and put a javelin to his heart; and he did cause the death of the king immediately, that he did not awake his servants.

Teancum snuck quietly into the king’s tent. He put a spear to his heart. He killed the king right away. The king did not wake up his servants.

Teancum snuck into the king’s tent and drove a javelin through his heart. Amalickiah died instantly, without waking his servants.