Ali 'Imran 3:61

Faman hajjaka feehi min baAAdi majaaka mina alAAilmi faqul taAAalaw nadAAu abnaanawaabnaakum wanisaana wanisaakumwaanfusana waanfusakum thumma nabtahil fanajAAal laAAnataAllahi AAala alkathibeen

Then whoever argues with you about it after [this] knowledge has come to you - say, "Come, let us call our sons and your sons, our women and your women, ourselves and yourselves, then supplicate earnestly [together] and invoke the curse of Allāh upon the liars [among us]."

If someone argues with you (O Prophet) over this after the knowledge that has come to you, say (to him), “Come, let us call our sons and your sons, our women and your women, ourselves and yourselves, then (let us) pray and invoke the curse of Allah upon the liars.”