Narrated Ibn Ti'li: We fought along with Abdur Rahman ibn Khalid ibn al-Walid. Four infidels from the enemy were brought to him. He commanded about them and they were killed in confinement. Abu Dawud said: The narrators other than Saeed reported from Ibn Wahb in this tradition: " (killed him) with arrows in confinement. " When Abu Ayyub al-Ansari was informed about it, he said: I heard the Messenger of Allah ﷺ prohibiting to kill in confinement. By Him in Whose hands my soul is, if there were a hen, I would not kill it in confinement. Abdur-Rahman bin Khalid bin al-Walid was informed about it (the Prophet's prohibition). He set four slaves free.
Hadith Referenceسنن ابي داود / كتاب الجهاد / 2687
Hadith Gradingالألبانی:ضعيف | زبیر علی زئی:ضعيف, إسناده ضعيف, بكير بن عبد اللّٰه بن الأشج رواه عن أبيه عن عبيد بن تعلي به انظر مسند أحمد (422/5ح23987), و أبوه : مجهول الحال،لم يوثقه غير ابن حبان فيما أعلم فالسند معلل, انوار الصحيفه، صفحه نمبر 98
Hadith Takhrij« تفرد بہ أبوداود، (تحفة الأشراف: 3475)، وقد أخرجہ: مسند احمد (5/422)، سنن الدارمی/الاضاحي 13 (2017) (حسن) »