Rejection of Pre-Islamic Customs

وَإِذَا بُشِّرَ أَحَدُهُم بِٱلْأُنثَىٰ ظَلَّ وَجْهُهُۥ مُسْوَدًّا وَهُوَ كَظِيمٌ

And when one of them is informed of [the birth of] a female, his face becomes dark, and he suppresses grief.

لِّلَّهِ مُلْكُ ٱلسَّمَـٰوَٰتِ وَٱلْأَرْضِ ۚ يَخْلُقُ مَا يَشَآءُ ۚ يَهَبُ لِمَن يَشَآءُ إِنَـٰثًا وَيَهَبُ لِمَن يَشَآءُ ٱلذُّكُورَ

To Allāh belongs the dominion of the heavens and the earth; He creates what He wills. He gives to whom He wills female [children], and He gives to whom He wills males.