The sin for being the first‼️

Allah ﷻ said: { لِیَحۡمِلُوۤا۟ أَوۡزَارَهُمۡ كَامِلَةࣰ یَوۡمَ ٱلۡقِیَـٰمَةِ وَمِنۡ أَوۡزَارِ ٱلَّذِینَ یُضِلُّونَهُم بِغَیۡرِ عِلۡمٍۗ أَلَا سَاۤءَ مَا یَزِرُونَ } “Let them bear their burdens in full on the Day of Judgment as well as some of the burdens of those they mislead without knowledge. Evil indeed is what they will bear!” [Surah An-Naḥl: 25] The Prophet ﷺ said: وَمَنْ دَعَا إِلَى ضَلاَلَةٍ كَانَ عَلَيْهِ مِنَ الإِثْمِ مِثْلُ آثَامِ مَنْ تَبِعَهُ لاَ يَنْقُصُ ذَلِكَ مِنْ آثَامِهِمْ شَيْئًا. “Whoever calls to misguidance will carry (the burden) of its sin, similar to those who committed it, without their sins being diminished in any respect.” [Muslim, 2674] He ﷺ also said: لَيْسَ مِنْ نَفْسٍ تُقْتَلُ ظُلْمًا إِلاَّ كَانَ عَلَى ابْنِ آدَمَ الأَوَّلِ كِفْلٌ مِنْهَا. "None is killed unjustly, except the first son of Adam will have a share in the sin." [ Bukhari, 7321]