Sunan an-Nasa'i 4005

أَخْبَرَنَا مُحَمَّدُ بْنُ رَافِعٍ، قَالَ حَدَّثَنَا شَبَابَةُ بْنُ سَوَّارٍ، قَالَ حَدَّثَنِي وَرْقَاءُ، عَنْ عَمْرٍو، عَنِ ابْنِ عَبَّاسٍ، عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ ‏"‏ يَجِيءُ الْمَقْتُولُ بِالْقَاتِلِ يَوْمَ الْقِيَامَةِ نَاصِيَتُهُ وَرَأْسُهُ فِي يَدِهِ وَأَوْدَاجُهُ تَشْخُبُ دَمًا يَقُولُ يَا رَبِّ قَتَلَنِي حَتَّى يُدْنِيَهُ مِنَ الْعَرْشِ ‏"‏ ‏.‏ قَالَ فَذَكَرُوا لاِبْنِ عَبَّاسٍ التَّوْبَةَ فَتَلاَ هَذِهِ الآيَةَ ‏{‏ وَمَنْ يَقْتُلْ مُؤْمِنًا مُتَعَمِّدًا ‏}‏ قَالَ مَا نُسِخَتْ مُنْذُ نَزَلَتْ وَأَنَّى لَهُ التَّوْبَةُ

It was narrated from Ibn 'Abbas that:The Prophet [SAW] said: "The slain will bring his killer on the Day of Resurrection with his forelock and his head in his hand, and with his jugular veins flowing with blood, and will say: 'O Lord, he killed me,' until he draws near to the Throne." They mentioned repentance to Ibn 'Abbas and he recited this Verse: "And whoever kills a believer intentionally, his recompense is Hell" He said: "It has not been abrogated since it was revealed; there is no way he could repent

Reference

Sunan an-Nasa'i 4005

In-book

Book 37, Hadith 40