Q. What does the passage in Deut 25:7-10 mean? What is the family of the unsandaled and its significance?
A. This passage refers to “Levirate Law”. Let me quote from Easton’s Bible Dictionary:
From Latin levir, “a husband’s brother,” the name of an ancient custom ordained by Moses, by which, when an Israelite died without issue, his surviving brother was required to marry the widow, so as to continue his brother’s family through the son that might be born of that marriage:
Gen 38:8 Then Judah said to Onan, “Lie with your brother’s wife and fulfill your duty to her as a brother-in-law to produce offspring for your brother.”
Ruth 4:10 I have also acquired Ruth the Moabitess, Mahlon’s widow, as my wife, in order to maintain the name of the dead with his property, so that his name will not disappear from among his family or from the town records. Today you are witnesses!”
Its object was “to raise up seed to the departed brother.”
The Expositor’s Bible Commentary’s explanation of this passage is:
If the man did not want to marry his brother’s wife, the widow could hold him up to public shame and disapproval by bringing the matter to court (the city gate) before the elders (v. 7). There she would indict her husband’s brother for his refusal to carry on her late husband’s name. If the elders failed to break the man’s persistence in not marrying the woman (v. 8), she was to take off one of his sandals, spit in his face, and denounce him as one who would not build up his brother’s family line (v. 9). His family line would then be known as “The Family of the Unsandaled” (v. 10). The legislation makes possible the release of the brother-in-law from his duty, while definitely discouraging such failure by the shame involved in being brought to court, spit upon, and labeled as “The Family of the Unsandaled”.
In the NT, the Sadducees tested Jesus by quoting this law and making up the story of seven brothers each successively marrying the same woman:
Mt 22:24 “Teacher,” they said, “Moses told us that if a man dies without having children, his brother must marry the widow and have children for him.”
As to its significance, I believe the Levirate law explained how two of the five women (Tamar, Rahab, Ruth, Bathsheba (not directly named, but identified as Uriah’s wife), Mary) in Jesus’ genealogy got there:
Mt 1:3 Judah the father of Perez and Zerah, whose mother was Tamar, Perez the father of Hezron, Hezron the father of Ram.
Mt 1:5 Salmon the father of Boaz, whose mother was Rahab, Boaz the father of Obed, whose mother was Ruth, Obed the father of Jesse,
Normally women’s names are not included in ancient Jewish patriarchal society. Tamar gave birth to the twins Perez and Zerah out of an incestuous relationship with Judah. Ruth was a Moabitess, a foreigner. Their inclusion in Jesus’ ancestry indicated God’s salvation is for all men and women, including those with tainted backgrounds, and pagans, not just for His chosen people. [Rahab’s and Bathsheba’s inclusion had nothing to do with the Levirate’s law, but they too had a dubious background.] God loves all mankind and offers salvation to all. We should do away with our prejudices and do the same.