It is narrated from Umm Hani’s freed slave Abu Salih that Harith bin Suwaid pledged allegiance to the Messenger of Allah (peace and blessings be upon him) and believed in him. Then he joined the people of Makkah and participated in Uhud (on their side), and fought against the Muslims. Then he felt ashamed and returned to Makkah, and wrote a letter to his brother Julas bin Suwaid:“O my brother! I am regretful for what I have done, so I repent to Allah and turn back to Islam. Mention this matter before the Messenger of Allah (peace and blessings be upon him), and if you have hope regarding the acceptance of my repentance, then write to me.”Julas mentioned this before the Messenger of Allah (peace and blessings be upon him), so Allah the Exalted revealed this verse: { کَیْفَ یَہْدِی اللَّہُ قَوْمًا کَفَرُوا بَعْدَ إِیمَانِہِمْ } Upon this, some of his former companions said,“He supports his people against us, then turns back to Islam.”So this verse was revealed: {إِنَّ الَّذِینَ کَفَرُوا بَعْدَ إِیمَانِہِمْ، ثُمَّ ازْدَادُوا کُفْرًا، لَنْ تُقْبَلَ تَوْبَتُہُمْ وَأُولَئِکَ ہُمُ الضَّالُّونَ }