'Acquire' in the Bible

Then Boaz said, “On the day you buy the land from Naomi, you will also acquire Ruth the Moabitess, the wife of the deceased man, to perpetuate the man’s name on his property.”

I will also acquire Ruth the Moabitess, Mahlon’s widow, as my wife, to perpetuate the deceased man’s name on his property, so that his name will not disappear among his relatives or from the gate of his home. You are witnesses today.”