Contradiction with Matthew 22:30
This verse mentions that in the resurrection people neither marry nor are given in marriage, which contrasts with Ruth 4:10 where marriage is a key action to sustain lineage.
Matthew 22:30: But as touching the resurrection of the dead, have ye not read that which was spoken unto you by God, saying,
Contradiction with 1 Corinthians 7:8
Paul advises the unmarried and widows to remain single, which contrasts with Boaz's marriage to Ruth, a widow, in Ruth 4:10.
1 Corinthians 7:8: I say therefore to the unmarried and widows, It is good for them if they abide even as I.
Contradiction with 1 Corinthians 7:39
This verse allows widows to remarry, but only in the Lord, whereas Ruth 4:10 concerns a Levirate marriage arranged to preserve a family name.
1 Corinthians 7:39: The wife is bound by the law as long as her husband liveth; but if her husband be dead, she is at liberty to be married to whom she will; only in the Lord.
Contradiction with 1 Timothy 5:11-12
Advises younger widows to remarry, but criticizes when they cast off their first faith, whereas Ruth 4:10 depicts a widow marrying for family duty.
1 Timothy 5:11-12: But the younger widows refuse: for when they have begun to wax wanton against Christ, they will marry;