Umar on Covenants: I will execute someone who unlawfully kills an idolater

Abu Salama reported: Umar ibn Al-Khattab, may Allah be pleased with him, said, “By Allah, if one of you were to give a gesture of safety to an idolater and he came trusting you and you killed him, then I would execute you for it.”

Source: Sunan Sa’eed ibn Mansur 2439

عَنْ عُمَرَ بْنِ أَبِي سَلَمَةَ عَنْ أَبِيهِ قَالَ قَالَ عُمَرُ بْنُ الْخَطَّابِ رَضِيَ اللَّهُ عَنْهُ وَاللَّهِ لَوْ أَنَّ أَحَدَكُمْ أَشَارَ بِأُصْبُعِهِ إِلَى السَّمَاءِ إِلَى مُشْرِكٍ فَنَزَلَ إِلَيْهِ عَلَى ذَلِكَ فَقَتَلَهُ لَقَتَلْتُهُ بِهِ

2439 سنن سعيد بن منصور كتاب الجهاد باب الإشارة إلى المشركين والوفاء