Then Boaz said, “On the day you buy the land from Naomi and also from Ruth the Moabitess, you must also acquire the widow of the deceased in order to raise up the name of the deceased on his inheritance.”
Here, 1. Boaz calls a court immediately. It is probable he was himself one of the elders (or aldermen) of the city; for he was a mighty man of wealth. Perhaps he was father of the city, and sat chief; for he seems here to have gone up to the gate as one having authority, and not as a common person; like Job, Job 29:7, etc.
Commenting on Ruth 4:1-8
Then said Boaz,.... In order to try the kinsman, whether he would abide by his resolution, he acquaints him with what he had as yet concealed: what day thou buyest the field of Naomi, thou must buy it also of Ruth the Moabitess, the wife of the dead; the wife of Mahlon, who was dead, the eldest son of Naomi, and so his widow, Ruth...
Then said Boaz, What day thou buyest the field of the hand of Naomi, thou must buy [it] also of Ruth the Moabitess, the wife of the dead, to raise up the name of the dead upon his inheritance. (d) That his inheritance might bear his name that is dead.