Surah Maryam, ayah 92

وَمَا يَنۢبَغِي لِلرَّحۡمَٰنِ أَن يَتَّخِذَ وَلَدًا ٩٢

Wamā yambaghī lir-rahmāni an yattakhidha waladā

And it is not appropriate for the Most Merciful that He should take a son.