It is narrated from Ubaid bin Ta'li, he says: We fought a battle under the leadership of Abdur Rahman bin Khalid bin Walid. Four disbelievers from among the non-Arabs were brought to him, and he ordered regarding them, so they were tied up and killed with arrows. When this reached Sayyiduna Abu Ayyub (may Allah be pleased with him), he said: I heard the Messenger of Allah (peace and blessings be upon him) forbidding killing by tying up.
Hadith Referenceالفتح الربانی / كتاب الجهاد / 5109
Hadith Gradingمحدثین:ضعیف
Hadith Takhrij«المرفوع منه صحيح لغيره، وھذا اسناد ضعيف،فان فيه علي الصواب بين بكير بن عبد الله وبين ابن تِعلي والدَ بكير عبدَ الله بن الاشج وھو مجھول، أخرجه أبوداود: 2687، (انظر مسند أحمد ترقيم الرسالة: 23590 ترقیم بيت الأفكار الدولية: 23988»
Brief Explanation
Benefits: … It appears that the battle fought in the region of Rome refers to the expedition of Constantinople, because its commander was Abdur Rahman bin Khalid. This took place in the year 44 AH.