﴿ أَمْ لَهُمْ شُرَكَآءُ فَلْيَأْتُوا۟ بِشُرَكَآئِهِمْ إِن كَانُوا۟ صَٰدِقِينَ ﴾

“Or have they, perchance, any sages to support their views? Well, then, if they are sincere in this their claim, let them produce those supporters of theirs”

Or do they have partners? who agree with them in this claim of theirs and able to guarantee it for them; if that is the case Then let them produce their partners those who will guarantee this for them if they are truthful.