Hadithcore
Mishkat al-Masabih, 3479

Jabir reported God’s Messenger as saying, “I will not forgive any-one who kills after accepting blood wit.” Abu Dawud transmitted it.

وَعَنْ جَابِرٍ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «لَا أُعْفِي مَنْ قَتَلَ بعدَ أَخذ الديةِ» . رَوَاهُ أَبُو دَاوُد

References1 variant
In-Book Reference
Book 16, Hadith 29