intercession (shafa'ah)

ٱسْتَغْفِرْ لَهُمْ أَوْ لَا تَسْتَغْفِرْ لَهُمْ إِن تَسْتَغْفِرْ لَهُمْ سَبْعِينَ مَرَّةً فَلَن يَغْفِرَ ٱللَّهُ لَهُمْ ۚ ذَٰلِكَ بِأَنَّهُمْ كَفَرُوا۟ بِٱللَّهِ وَرَسُولِهِۦ ۗ وَٱللَّهُ لَا يَهْدِى ٱلْقَوْمَ ٱلْفَـٰسِقِينَ

Ask forgiveness for them, [O Muḥammad], or do not ask forgiveness for them. If you should ask forgiveness for them seventy times - never will Allāh forgive them. That is because they disbelieved in Allāh and His Messenger, and Allāh does not guide the defiantly disobedient people.

يَوْمَئِذٍ لَّا تَنفَعُ ٱلشَّفَـٰعَةُ إِلَّا مَنْ أَذِنَ لَهُ ٱلرَّحْمَـٰنُ وَرَضِىَ لَهُۥ قَوْلًا

That Day, no intercession will benefit except [that of] one to whom the Most Merciful has given permission and has accepted his word.

قُل لِّلَّهِ ٱلشَّفَـٰعَةُ جَمِيعًا ۖ لَّهُۥ مُلْكُ ٱلسَّمَـٰوَٰتِ وَٱلْأَرْضِ ۖ ثُمَّ إِلَيْهِ تُرْجَعُونَ

Say, "To Allāh belongs [the right to allow] intercession entirely. To Him belongs the dominion of the heavens and the earth. Then to Him you will be returned."

فَمَا تَنفَعُهُمْ شَفَـٰعَةُ ٱلشَّـٰفِعِينَ

So there will not benefit them the intercession of [any] intercessors.