The Messenger of Allah ﷺ said, "Kill the elderly men among the polytheists, but spare their young."
حدثنا سعيد بن منصور حدثنا هشيم حدثنا حجاج حدثنا قتادة عن الحسن
قال رسول الله ﷺ اقتلوا شيوخ المشركين واستبقوا شرخهم
Grading, its isnad is daif.Tirmidhi transmitted it in the Book of Military Expeditions, chapter on descending upon a ruling, no. 1583, from the hadith of Qatada with this wording, and he said, hasan sahih gharib. Ahmad also narrated it, 5/20, from Hushaym with this wording.Qatada is a mudallis and narrated it with an", meaning ambiguous transmission.