At Naomi's advice, Ruth goes to Boaz's threshing floor at night. Ruth 3. There Ruth asks him if he wants to marry her. “Because you are the redeemer,” she adds.
What is a redeemer? Leviticus 25:25 says, “If your brother becomes poor and has to sell part of his property, let his redeemer come who is close to him and redeem what his brother has sold.”
Ruth 4 verse 3 says that Naomi sold the land of her deceased husband Elimelech.
But a piece of land that belonged to a family as an inheritance could not be sold forever.
Naomi knew that Boaz, on whose land Ruth had come to glean, was a kinsman; one of the possible redeemers.
In Ruth 4, the provision of redemption appears to be combined with the provision of levirate marriage. That is a marriage of a man to the widow of a deceased brother, if no children were born of that marriage. The first child is then considered to be a child of the deceased brother. In this way it is ensured that the legacy of the brother is not lost. See Deuteronomy 25 verse 5.
Boaz replies to Ruth (Ruth 3:13) that he is willing to take on the responsibility of the redeemership, but he knows there is another, closer kinsman. If he is not willing to redeem, Boaz will.
Boaz goes to the gatehouse of Bethlehem the next day to settle the matter officially.
In Ruth 4 verse 5 he tells the closer relative that in this case the redeemer also has a duty to marry Ruth, "to preserve the name of the dead (Machlon) over his inheritance." The closer kinsman then refuses redemption; he wanted to buy the land but not marry Ruth.
In confirmation of his giving Boaz the right to be redeemer, he takes off his shoe and gives it to Boaz.
Boaz accepts the responsibility of the redeemership and takes Ruth as his wife.
In the Bible, the LORD is called the Redeemer. Psalm 19 verse 15. Job 19 verse 25.
For example, when the Israelites were enslaved in Egypt, God rose up to redeem them and give them an inheritance in the Promised Land.
The Father gives His Son Jesus Christ as a Savior.
The redeemership in Israel was a prefiguration of this. Jesus “sets his soul as a ransom
for many" Matthew 20:28.
He became a "relative" to us by becoming human as God's Son; family of Adam and
his offspring. Thus He became Savior who paid the sin debt of the world.
“For God so loved the world that He gave His only begotten Son,
that whoever believes in Him should not perish, but have eternal life.” John 3:16.
In the Bible, the Lord is also called the Bridegroom of Israel. Isaiah 54 verse 5, 62 verse 5, Jeremiah 2 verse 32, as in the New Testament the congregation of believers is called the Bride of Christ. 2 Corinthians 11 verse 2. He is faithful to his covenant.