Deuteronomy 25:8-10

8Then the elders of his town shall summon him and talk to him. If he persists in saying, “I do not want to marry her,”

9his brother’s widow shall go up to him in the presence of the elders, take off one of his sandals, spit in his face and say, “This is what is done to the man who will not build up his brother’s family line.”

10That man’s line shall be known in Israel as The Family of the Unsandaled.