What will take place in the Discussion between the People of Paradise and the People of the Hellfire

Allah informs that,

كُلُّ نَفْسٍ بِمَا كَسَبَتْ رَهِينَةٌ

فَمَا تَنْفَعُهُمْ شَفَاعَةُ الشّٰفِعِيْنَ (Then intercession of intercessors will not avail them...74:48) The attached pronoun of tanfa'uhum refers to those sinners who have been mentioned in the preceding verses. They confessed to four crimes: [ 1] they did not perform obligatory prayers; [ 2] they did not feed the poor, that is, they did not spend on the necessities of the poor; [ 3] they indulged (in mocking at the truth) along with those who indulged in opposing Islam or committing sins and shameful deeds; and [ 4] they denied the Day of Requital.

This verse purports to say that whoever has these characteristics, including denial of the Day of Requital, is an infidel. The intercession of anyone who tries to intercede for an infidel will be of no benefit to him on the Day of Judgment. Even if all the intercessors join forces to intercede, it will not help. This is because intercession is only useful if the conditions for it are met. Therefore, the verse uses the plural expression, thus: شَفَاعَةُ الشّٰفِعِيْنَ