LikethehouseofPharez - This was very appropriate; for from Pharez, the son of Judah, by Tamar, came the family of the Beth-lehemites and that of Elimelech.
Matthew Henry
Concise Bible Commentary
Men are ready to seize opportunities for increasing their estates, but few know the value of godliness. Such are the wise men of this world, whom the Lord charges with folly. They attend not to the concerns of their souls, but reject the salvation of Christ, for fear of marring their inheritance. But God did Boaz the honour to bring him into the line of the Messiah, while the kinsman, who was afraid of lessening himself, and marring his inheritance, has his name, family, and inheritance forgotten.
SDA Bible Commentary (limited)
Volume 1-7
12. The house of Pharez. See Gen. 38:12-29. This statement prepares the way for the genealogy of vs.18-22, which would seem therefore not to be a later editorial addition but an integral part of the story in its original form.