كَتَبَ عَلِيُّ بْنُ مُوسَى الرِّضَا ع إِلَى مُحَمَّدِ بْنِ سِنَانٍ فِيمَا كَتَبَ مِنْ جَوَابِ مَسَائِلِهِ حَرَّمَ اللَّهُ قَتْلَ النَّفْسِ لِعِلَّةِ فَسَادِ الْخَلْقِ فِي تَحْلِيلِهِ لَوْ أَحَلَّ وَ فَنَائِهِمْ وَ فَسَادِ التَّدْبِيرِ وَ حَرَّمَ اللَّهُ تَبَارَكَ وَ تَعَالَى عُقُوقَ الْوَالِدَيْنِ لِمَا فِيهِ مِنَ الْخُرُوجِ مِنَ التَّوْقِيرِ لِلَّهِ عَزَّ وَ جَلَّ وَ التَّوْقِيرِ لِلْوَالِدَيْنِ وَ كُفْرَانِ النِّع
Hadith.4934 - Imam Ali ibn Musa Ar-Ridha (as) wrote to Muhammad ibn Sinan in response to his questions: "Allah (swt) has forbidden the killing of a soul because of the corruption it would cause among creation if it were permitted, leading to their annihilation and the disruption of order. Allah (swt), Blessed and Exalt