Ruth 4:21 is a short line in a family tree. It tells us that Salmon was the father of Boaz, and that Boaz was the father of Obed, linking two generations of the family that brought Ruth and Boaz together. The verse is part of the closing genealogy of the book of Ruth, and it is spoken by the narrator rather than by any character in the story.
And Salmon became the father of Boaz, and Boaz became the father of Obed…
Ruth 4:21 (WEB)
What Ruth 4:21 Means
The verse does one simple job: it names a father and his son, then names that son’s father and his son. The phrase “became the father of” is the plain biblical way of saying “was the parent of,” and the genealogy moves down the family line one link at a time, from Salmon to Boaz to Obed.
Boaz is the central figure here. Earlier in the book he is a kinsman-redeemer who married Ruth, the Moabite widow who had chosen to stay with her mother-in-law Naomi. Verse 21 shows that his line continued through Obed, and this is the bridge that carries the story forward. The verse does not promise anything to the reader directly, and it doesn’t say how the family will fare. It simply records who came before and after.
What the verse does not do is explain the details of Salmon or Obed’s lives. The narrator is not interested in their personalities or their deeds here. The point is continuity: a line of descent that leads to the next important name in the chain.
The Context of Ruth 4:21
The book of Ruth is traditionally attributed to an unnamed author, and it was probably written to an Israelite audience sometime after the period of the judges. It tells a story of loyalty, provision and redemption set in the time before the monarchy. The genealogy at the end, which runs from Perez down to David, places the whole story inside the family history of Judah and shows how a foreign woman became part of that line.
Verse 21 sits in the middle of that genealogy, between verse 20, which names Salmon’s father Nahshon, and verse 22, which continues on to Jesse and David. Read in that setting, the verse is not a random list of names. It is one link in a chain that connects the story of Ruth to the royal house of Israel. That is why the book ends with a family tree and not with a final scene.
Key Phrases in Ruth 4:21
Ruth 4:17
The women, her neighbors, gave him a name, saying, “A son is born to Naomi”. They named him Obed. He is the father of Jesse, the father of David.
(WEB)
This verse names Obed as the son of Ruth and Boaz, and it explains how the child’s birth was celebrated by the women of Bethlehem. Reading it alongside Ruth 4:21 shows the human joy behind the family line that the genealogy records.
Matthew 1:5
Salmon became the father of Boaz by Rahab. Boaz became the father of Obed by Ruth. Obed became the father of Jesse.
(WEB)
Matthew’s genealogy of Jesus includes Boaz and Ruth by name, linking the line in Ruth 4:21 to the birth of Christ. This verse helps you see how a small family record in the Old Testament became part of the larger story of salvation.
A Short Prayer From Ruth 4:21
Lord, you know the names of every family and every generation, even the ones that seem small or forgotten. Thank you that my life is part of a story that you are writing. Help me to be faithful in the ordinary places you have put me, trusting that you will carry my faithfulness into the lives of those who come after me. Give me patience when I cannot see the outcome, and a quiet confidence that nothing I offer in your name is wasted. Amen.
