(And they say: Allah hath taken unto Himself a son…) [2:116]. This was revealed about the Jews who said: “Ezra is the son of Allah”, and the Christians of Najran who said: “Christ is the son of Allah”, and also the Arab idolaters who said: “The angels are Allah’s daughters”.
Asbab Al-Nuzul by Al-Wahidi , trans. Mokrane Guezzou