Ruth 4:18

"Now these are the generations of Perez: Perez begat Hezron, and Hezron begat Ram, and Ram begat Amminadab, and Amminadab begat Nahshon, and Nahshon begat Salmon, and Salmon begat Boaz, and Boaz begat Obed, and Obed begat Jesse, and Jesse begat David."

The termination of this genealogy with the name of David proves that the Book of Ruth was written DURING the life of David and at a time BEFORE he became king. Otherwise, the text would have referred to him as KING David.

To be sure, the critical "scholars," anxious to establish their fairy tale of a post-exilic date know this to be true. What is their defense against the facts? They simply declare Ruth 4:17-22, more than 25% of the whole chapter, to be an interpolation

The notion that the Book of Ruth was written in post-exilic times is unacceptable for the simple reason that at such a period in Israel's history, there could have been neither any interest in the production of such a book nor any motive whatever for terminating the genealogy with David. As Keil noted, "This genealogy makes it certain,"[22] that the purpose of the book was to disclose the pious ancestry of the wonderful person who later (after Ruth was written) became King of Israel.