Ruth 4:5

Then Boaz said, "On the day you buy the land from Naomi and also from Ruth the woman from Moab, you must also take the dead man's widow as your wife. This is to keep the dead man's name alive on his land."

Ruth 4:5, Readable English Bible (READ)

Note: Some manuscripts read: "you also acquire Ruth the Moabitess, the dead man's widow."