Deuteronomy 25:8-10

25:8 Then the elders of his city must summon him and speak to him. If he persists, saying, “I don’t want to marry her,” 25:9 then his sister-in-law must approach him in view of the elders, remove his sandal from his foot, and spit in his face. She will then respond, “Thus may it be done to any man who does not maintain his brother’s family line!” 25:10 His family name will be referred to in Israel as “the family of the one whose sandal was removed.”