(Az-Zukhuruf) 43 : 81
قُلْ إِنْ كَانَ لِلرَّحْمَٰنِ وَلَدٌ فَأَنَا أَوَّلُ الْعَابِدِينَ
You say: “If the Impartial had a son, then I would have been the first among those who serve Him.”
See explanation 19: 94-95; and 42: 11-14, 44.