'Holy' in the Bible

Then Joshua said to the people, “Sanctify yourselves [for His purpose], for tomorrow the Lord will do wonders (miracles) among you.”

The captain of the Lord’s army said to Joshua, “Remove your sandals from your feet, because the place where you are standing is holy (set apart to the Lord).” And Joshua did so.

Rise up! Consecrate the people and say, ‘Consecrate yourselves for tomorrow, for thus says the Lord, the God of Israel: “There are things under the ban among you, O Israel. You cannot stand [victorious] before your enemies until you remove the things under the ban from among you.”

Then Joshua said to the people, “You will not be able to serve the Lord [if you serve any other gods], for He is a holy God; He is a jealous God [demanding what is rightfully and uniquely His]. He will not forgive your transgression [of His law] or your sins.