Allah's Curse
If anyone argues with you after knowledge has come to you, say, ‘Come, let us gather ourselves and you, our children and your children, our women and your women, then let us sincerely pray and invoke Allah’s curse upon the liars.’
3:61And whoso disputeth with thee concerning him, after the knowledge which hath come unto thee, say (unto him): Come! We will summon our sons and your sons, and our women and your women, and ourselves and yourselves, then we will pray humbly (to our Lord) and (solemnly) invoke the curse of Allah upon those who lie.