'Unless' in the Bible

But He said to them, “You give them something to eat.” They said, “We have no more than five loaves and two fish—unless perhaps we go and buy food for all these people.”

I tell you, no; but unless you repent [change your old way of thinking, turn from your sinful ways and live changed lives], you will all likewise perish.

I tell you, no; but unless you repent [change your old way of thinking, turn from your sinful ways and live changed lives], you will all likewise perish.”