'Holy' in the Bible

The prince of Yahweh's army said to Joshua, "Take your shoes off of your feet; for the place on which you stand is holy." Joshua did so.

But all the silver, and gold, and vessels of brass and iron, are holy to Yahweh. They shall come into Yahweh's treasury."

Joshua said to the people, "You can't serve Yahweh; for he is a holy God. He is a jealous God. He will not forgive your disobedience nor your sins.