Musnad Ahmed: Hadith 2007

Abu Talib fell sick; Quraish came to visit him, as did the Messenger of Allah (ﷺ). There was a place by his head for a man to sit, and Abu Jahl went and sat there. They said: The son of your brother is criticizing our gods. He said: Why are your people complaining about you? He said: “O uncle, I want them to affirm one word by means of which the Arabs will submit to them and the non-Arabs will pay the jizyah to them.” He said: What is it? He said: “La ilaha illallah." They stood up and said: Has he made the gods all into One God? Then the verse " "Has he made the alihah (gods) (all) into One ilah (God - Allah). Verily, this is a curious thing!” [Sad 38.5) was revealed.