It was narrated from Al-Aswad bin Hilal - who met the Prophet - from a man from Banu Tha'labah bin Yarbu, that: some people from Banu Tha'labah killed a man from among the companions of the Messenger of Allah. A man from among the companions of the Messenger of the Allah said: "O Messenger of Allah, these are Banu Tha'labah who killed so and so". The Messenger said: "No soul is affected by the sin of another". Shu'bah (one of the narrators) said: "That means: No soul is responsible for the sin of another, and Allah knows best".
This hadith teaches us an important lesson about personal responsibility and accountability in our actions. We must take ownership over our own actions and not blame others or make excuses when we do something wrong. We must also remember that we are not responsible for other people's mistakes; everyone will be judged according to their own deeds on Judgment Day.