﴿ هَٰٓأَنتُمْ هَٰٓؤُلَآءِ جَٰدَلْتُمْ عَنْهُمْ فِى ٱلْحَيَوٰةِ ٱلدُّنْيَا فَمَن يُجَٰدِلُ ٱللَّهَ عَنْهُمْ يَوْمَ ٱلْقِيَٰمَةِ أَم مَّن يَكُونُ عَلَيْهِمْ وَكِيلًۭا ﴾

“Oh, you might well argue in their behalf in the life of this world: but who will argue in their behalf with God on the Day of Resurrection, or who will be their defender?”

Banu Ubayriq telling them that their support given to betrayers of trust in the mortal world does not end at that. There will be the Day of Doom when their case will come before Almighty Allah. Who will lend support to them at that time? The verse serves two purposes. It admonishes them, and then reminds them of the hazards of the Hereafter persuading them thereby to repent and turn to Allah.