39:4
لَّوْ أَرَادَ ٱللَّهُ أَن يَتَّخِذَ وَلَدًا لَّٱصْطَفَىٰ مِمَّا يَخْلُقُ مَا يَشَآءُ ۚ سُبْحَـٰنَهُۥ ۖ هُوَ ٱللَّهُ ٱلْوَٰحِدُ ٱلْقَهَّارُ
law arāda l-lahu an yattakhidha waladan la-iṣ'ṭafā mimmā yakhluqu mā yashāu sub'ḥānahu huwa l-lahu l-wāḥidu l-qahāru
God could have chosen any of His creation He willed for offspring, but He is far above this! He is the One, the Almighty.
Had Allâh willed to take a son (or offspring), He could have chosen whom He willed out of those whom He created. But glory be to Him! (He is above such things). He is Allâh, the One, the Irresistible.