AHMAD 9186:
from Abū Hurayrah —
No two such persons shall be together in Hell as if one of them is such that his presence hurts the other. It was asked: Messenger of Allah, who are they? He said: A believer who killed a disbeliever and (then) kept to the right path." (Using translation from Muslim 1891b)
أحمد ٩١٨٦:
عن ابو هريره —
قَالَ رَسُولُ اللهِ ﷺ لَا يَجْتَمِعَانِ فِي النَّارِ أَبَدًا اجْتِمَاعًا يَضُرُّ أَحَدَهُمَا قَالُوا مَنْ يَا رَسُولَ اللهِ؟ قَالَ مُؤْمِنٌ يَقْتُلُهُ كَافِرٌ ثُمَّ يُسَدَّدُ بَعْدُ
hadithunlocked.com