Did Ruth marry again after Boaz died?

Ruth 4:13 (King James Version)13So Boaz took Ruth, and she was his wife: and when he went in unto her, the LORD gave her conception, and she bare a son.

All the evidence available is that Ruth did indeed become the wife of Boaz. Ruth had adopted the God of Israel and effectively become a Jew in terms of her faith. This demonstrates the truth, often unrecognized, that what is important to God is not race as much as the inner attitude of the heart. There are other examples of non-Jews being blessed and being 'adopted' into God's people, including Rahab.

It is most likely that Boaz did not marry Ruth, the Moabite. According to God's Law, both Ammonites and Moabites were to be excluded from becoming part of God's people: "No Ammonite or Moabite - or any of their descendants, even in the tenth generation - may be included among God's people." (Deuteronomy 23:3).

God's reason for this exclusion? "They refused to provide you with food and water when you were on your way out of Egypt, and they hired Balaam son of Beor, from the city of Pethor in Mesopotamia, to curse you. But your God would not listen to Balaam; instead he turned the curse into a blessing, because he loved you." (Deuteronomy 23:4-5).

The law to keep Ammonites and Moabites from becoming part of God's people would be enforced for all time. God told the Israelites: "As long as you are a nation, never do anything to help these nations or to make them prosperous." (Deuteronomy 23:6).

If Boaz had married a Moabite woman, he would have disobeyed God's law and thereby brought a curse upon himself: "God's curse on anyone who does not obey all of God's laws and teachings." (Deuteronomy 27:26).