Arabic (Original)
وَقَالَ اشْتَدَّ غَضَبُ اللَّهِ عَلَى رَجُلٍ يَقْتُلُهُ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فِي سَبِيلِ اللَّهِ.
English Translation
And he said: 'The wrath of Allah is severe against a man whom the Messenger of Allah (peace be upon him) kills in the cause of Allah.'