So, the intercession of intercessors will not avail them.
48
Tafseer
'Abdullāh Ibn 'Abbās / Muḥammad al-Fīrūzabādī
تفسير : (the mediation of no mediators will avail them then) allah says: the intercession of the angels, prophets and righteous ones will not benefit them.
Jalāl al-Dīn al-Maḥallī
تفسير : thus the intercession of the intercessors, from among the angels, the prophets and the righteous, will not avail them, in other words, there will be no intercession for them.