Sayyiduna Abdullah bin Abi Awfa (may Allah be pleased with him) narrates that some people of the Arabs said: "O Messenger of Allah, we have accepted Islam and we did not fight you, whereas such-and-such tribe fought you." So Allah Almighty revealed this verse: "They regard it as a favour to you that they have accepted Islam. Say: Do not regard your Islam as a favour to me" to the end of the verse.
Imam al-Tabarani (may Allah have mercy on him) said: "No one narrated this hadith from Ibrahim al-Saksaki except Hajjaj, and no one from Hajjaj except Hafs, and Sahl bin Uthman is alone in narrating it."