'Otherwise' in the Bible

Also, you are not to leave the entrance to the Tent of Meeting. Otherwise, you'll die, since the LORD's anointing oil remains on you." So they followed Moses' instructions.

The LORD told Moses, "Remind your brother Aaron that at no time is he to enter the sacred place from the room that contains the curtain into the presence of the Mercy Seat on top of the ark. Otherwise, he'll die, because I will appear in a cloud at the Mercy Seat.