Show mercy and compassion towards innocent people especially children in times of war and conflict. Focus on punishing the person responsible for their actions instead taking revenge on someone else's family members .

This hadith is about the instruction given by the Prophet (ﷺ) regarding killing polytheists. He instructed that old men who are polytheists should be killed, but their children should be spared. This hadith teaches us that even in times of war and conflict, we must show mercy and compassion towards innocent people, especially children. We must not let our anger or hatred for a certain group of people cloud our judgement and lead us to commit acts of cruelty against innocent people. It also teaches us that we should never take revenge on someone else's family members for something they have done wrong; instead, we should focus on punishing the person responsible for their actions.