Ruth 4:10
“Moreover Ruth the Moabitess, the wife of Mahlon, have I purchased to be my wife, to raise up the name of the dead upon his inheritance, that the name of the dead be not cut off from among his brethren, and from the gate of his place: ye are witnesses this day.”
Therefore the kinsman said unto Boaz, Buy it for thee. So he drew off his shoe.
And Boaz said unto the elders, and unto all the people, Ye are witnesses this day, that I have bought all that was Elimelech’s, and all that was Chilion’s and Mahlon’s, of the hand of Naomi.
Moreover Ruth the Moabitess, the wife of Mahlon, have I purchased to be my wife, to raise up the name of the dead upon his inheritance, that the name of the dead be not cut off from among his brethren, and from the gate of his place: ye are witnesses this day.
And all the people that were in the gate, and the elders, said, We are witnesses. The Lord make the woman that is come into thine house like Rachel and like Leah, which two did build the house of Israel: and do thou worthily in Ephratah, and be famous in Beth–lehem:
And let thy house be like the house of Pharez, whom Tamar bare unto Judah, of the seed which the Lord shall give thee of this young woman.
Counter-Arguments
The strongest case that this verse does not belong in this theme.

Cross-References
“And the firstborn bare a son, and called his name Moab: the same is the father of the Moabites unto this day.”
“And Onan knew that the seed should not be his; and it came to pass, when he went in unto his brother’s wife, that he spilled it on the ground, lest that he should give seed to his brother.”
“And Laban gathered together all the men of the place, and made a feast.”
“And it shall be, that the firstborn which she beareth shall succeed in the name of his brother which is dead, that his name be not put out of Israel.”
“Then shall his brother’s wife come unto him in the presence of the elders, and loose his shoe from off his foot, and spit in his face, and shall answer and say, So shall it be done unto that man that will not build up his brother’s house.”