This entry is in the series of Thirty-Nine Reasons Jesus Came to Die, concerning the Book of Ruth.
Set in the middle of Judges, most likely around the beginning of Judges 10, the Book of Ruth contains amazing prophecies for Christ and that his church would be larger than just Israel. The most obvious link to Jesus in this book is that Ruth is Jesus' great-grandmother several generations removed, and also a Gentile (Matthew 1:5). Her assimilation into not just Israel, but the salvation of God, looks forward to a time when Jesus would say, "And I have other sheep that are not of this fold. I must bring them also, and they will listen to my voice. So there will be one flock, one shepherd." (John 10:16)
Other important themes are the rigidness to the law (Ruth 4:4), the caring for the poor (Ruth 2:7), and the price paid for a bride who was in servitude (Ruth 4:10, 1 Corinthians 7:23).
But the main prophecy of Jesus in the book of Ruth is that of Kinsmen Redeemer. This person was able and compelled to purchase a family member out of slavery (Leviticus 25:47-49), to purchase land sold (Leviticus 25:25), and to perpetuate a lineage of a dead brother (Deuteronomy 25:5-6, Ruth 2:20). Boaz is a kinsmen redeemer of Naomi (Ruth's mother-in-law), and also Naomi's dead husband and dead sons, but he is honest that there is a nearer redeemer. In the book, the nearer redeemer waves his right in order for Boaz to be able to be both redeemer and husband to Ruth.
Jesus Christ is our Nearer Kinsmen Redeemer, a brother by our adoption (Romans 8:14-15,29), the God who created us (Colossians 1:15-16), and the one who paid the price for our ransom from slavery (1 Peter 1:18-19).
Into your hand I commit my spirit; you have redeemed me, O LORD, faithful God. – Psalm 31:5
For I know that my Redeemer lives and at the last he will stand upon the earth. – Job 19:25