Hadith Referenceسنن ترمذي / كتاب السير عن رسول الله صلى الله عليه وسلم / 1583
Hadith Gradingالألبانی:ضعيف، المشكاة (3952 / التحقيق الثاني) ، ضعيف أبي داود (259) // (571 / 2670) ، ضعيف الجامع الصغير (1063) بلفظ: واستبقوا شرخهم // | زبیر علی زئی:(1583) إسناده ضعيف / د 2670
Hadith Takhrij«سنن ابی داود/ الجہاد 121 (2670) ، ( تحفة الأشراف : 4592) ، و مسند احمد (5/12، 20) (ضعیف) (سند میں قتادہ اور حسن بصری دونوں مدلس راوی ہیں، اور روایت عنعنہ سے ہے)»
Narrated Samurah ibn Jundub: The Prophet ﷺ said: Kill the old men who are polytheists, but spare their children.
Shaykh Umar Farooq Saeedi
Benefits and Issues: By "elders" (shuyukh) are meant such old men whose youth has passed, but who are still capable of fighting, or who incite the young men to fight.
Source: Sunan Abu Dawood – Commentary by Shaykh Umar Farooq Saeedi, Page: 2670
Samurah (RAA) narrated that The Messenger of Allah (ﷺ) said: “Kill the mature men of the polytheists but spare their children.” Related by Abu Dawud and At-Tirmidhi graded it as Sahih.
Moreover, there is generally greater hope from the younger generation that they will soon enter the fold of Islam and become helpful and supportive in spreading Islam, while such hope is rarely held for the elderly and aged people.
Source: Bulugh al-Maram: Commentary by Safiur Rahman Mubarakpuri, Page: 1095