Joshua 6:10

6:10 Now Joshua had instructed the army, “Do not give a battle cry or raise your voices; say nothing until the day I tell you, ‘Give the battle cry.’ Then give the battle cry!”

Joshua 20:5

20:5 When the avenger of blood comes after him, they must not hand over to him the one who committed manslaughter, for he accidentally killed his fellow man without premeditation.