'Beware' in the Bible

He sent messengers to Abimelech, who was in Arumah, reporting, "Beware! Gaal son of Ebed and his brothers are coming to Shechem and inciting the city to rebel against you.

Now therefore beware, I pray thee, and drink not wine nor strong drink, and eat not any unclean thing:

And the angel of the LORD said unto Manoah, Of all that I said unto the woman let her beware.