'Unless' in the Bible

He said, "Good; I will make a treaty with you; but one thing I require of you. That is, you shall not see my face, unless you first bring Michal, Saul's daughter, when you come to see my face."

The king and his men went to Jerusalem against the Jebusites, the inhabitants of the land, who spoke to David, saying, "Unless you take away the blind and the lame, you shall not come in here;" thinking, "David can't come in here."