Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
bukhari:4764Ādam > Shuʿbah > Manṣūr > Saʿīd b. Jubayr > Saʾalt Ibn ʿAbbās > Qawlih Taʿālá Fajazāʾuh Jahannam > Lā Tawbah Lah

I asked Ibn ʿAbbas about Allah's saying:-- '.. this reward is Hell Fire.' (4.93) He said, "No repentance is accepted from him (i.e. the murderer of a believer)." I asked him regarding the saying of Allah: 'Those who invoke not with Allah any other god.' ...(25.68) He said, "This Verse was revealed concerning the pagans of the pre-lslamic period."  

البخاري:٤٧٦٤حَدَّثَنَا آدَمُ حَدَّثَنَا شُعْبَةُ حَدَّثَنَا مَنْصُورٌ عَنْ سَعِيدِ بْنِ جُبَيْرٍ قَالَ سَأَلْتُ ابْنَ عَبَّاسٍ ؓ عَنْ قَوْلِهِ تَعَالَى {فَجَزَاؤُهُ جَهَنَّمُ} قَالَ لاَ تَوْبَةَ لَهُ

وَعَنْ قَوْلِهِ جَلَّ ذِكْرُهُ {لاَ يَدْعُونَ مَعَ اللَّهِ إِلَهًا آخَرَ} قَالَ كَانَتْ هَذِهِ فِي الْجَاهِلِيَّةِ