The answer
Through the levirate marriage to Boaz, the close relative of Mahlon, Ruth keeps the paternal lineage of Mahlon to her children. However, Boaz (the head of the Sanhedrin Jewish High Court) was not only the biological grandfather to Christ, but was also a symbol of Christ the Redeemer. Thus, his spiritual role in the holy Book of Ruth identifies Boaz as both the biological, lawful, royal, and spiritual father to Obed, the father of Jesse, the father of the prophet David, to whom Christ is identified as the Son of David.Answered by His Eminence Metropolitan Youssef (opens in a new tab)