'Unless' in the Bible

how he entered into the house of God and took the shewbread and ate, and gave to those also who were with him, which it is not lawful that any eat, unless the priests alone?

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

No, I tell you; but unless you repent, you will all perish as well!

No, I tell you; but unless you repent, you will all perish as well!”

In the same way, none of you can be my disciple unless he gives up all his possessions."