Impossibility of intercession for sins without repentance

وَقَالَ ٱلَّذِينَ كَفَرُوا۟ لِلَّذِينَ ءَامَنُوا۟ ٱتَّبِعُوا۟ سَبِيلَنَا وَلْنَحْمِلْ خَطَـٰيَـٰكُمْ وَمَا هُم بِحَـٰمِلِينَ مِنْ خَطَـٰيَـٰهُم مِّن شَىْءٍ ۖ إِنَّهُمْ لَكَـٰذِبُونَ

And those who disbelieve say to those who believe, "Follow our way, and we will carry your sins." But they will not carry anything of their sins. Indeed, they are liars.