Quran Al-Isra 17:31
وَلَا تَقۡتُلُوٓاْ أَوۡلَٰدَكُمۡ خَشۡيَةَ إِمۡلَٰقٖۖ نَّحۡنُ نَرۡزُقُهُمۡ وَإِيَّاكُمۡۚ إِنَّ قَتۡلَهُمۡ كَانَ خِطۡـٔٗا كَبِيرٗا ٣١
Translation
And do not kill your children for fear of poverty. We provide for them and for you. Indeed, their killing is ever a great sin.