﴿يَهَبُ لِمَنْ يَشَاءُ إِنَاثًا وَيَهَبُ لِمَنْ يَشَاءُ الذُّكُورَ﴾
He grants daughters to whom He wills and sons to whom He wills. (Al-Shūrā 42:49)
﴿أَوْ يُزَوِّجُهُمْ ذُكْرَانًا وَإِنَاثًا وَيَجْعَلُ مَنْ يَشَاءُ عَقِيمًا﴾
Or He grants both sons and daughters, and makes whomever He wills childless. (Al-Shūrā 42:50)
Four possibilities are covered:
1. Daughters only.
2. Sons only.
3. Both daughters and sons.
4. No children.
Under the relevant distinctions of presence and combination of children, this is a comprehensive division.