The Reason Why Ghusl (ritual bath) is Obligatory for Janabah (ritual impurity) but Not Urine and Feces

لِأَيِّ شَيْ‌ءٍ أَمَرَ اللَّهُ تَعَالَى بِالاغْتِسَالِ مِنَ الْجَنَابَةِ وَ لَمْ يَأْمُرْ بِالْغُسْلِ مِنَ الْغَائِطِ وَ الْبَوْلِ فَقَالَ رَسُولُ اللَّهِ ص إِنَّ آدَمَ لَمَّا أَكَلَ مِنَ الشَّجَرَةِ دَبَّ ذَلِكَ فِي عُرُوقِهِ وَ شَعْرِهِ وَ بَشَرِهِ فَإِذَا جَامَعَ الرَّجُلُ أَهْلَهُ خَرَجَ الْمَاءُ مِنْ كُلِّ عِرْقٍ وَ شَعْرَةٍ فِي جَسَدِهِ فَأَوْجَبَ اللَّهُ عَزَّ وَ جَلَّ عَلَى ذُرِّيَّتِهِ الِاغْتِسَالَ مِنَ الْ

Hadith.170 - A group of Jews came to the Messenger of Allah (sw), and the most learned among them asked him several questions. Among those, he asked: 'Why did Allah (swt) command ghusl (ritual bathing) after janabah (ritual impurity due to sexual discharge) but did not command ghusl after defecation and urination?' The

وَ كَتَبَ الرِّضَا ع إِلَى مُحَمَّدِ بْنِ سِنَانٍ- فِيمَا كَتَبَ مِنْ جَوَابِ مَسَائِلِهِ- عِلَّةُ غُسْلِ الْجَنَابَةِ النَّظَافَةُ لِتَطْهِيرِ الْإِنْسَانِ مِمَّا أَصَابَ مِنْ أَذَاهُ‌[2] وَ تَطْهِيرِ سَائِرِ جَسَدِهِ لِأَنَّ الْجَنَابَةَ خَارِجَةٌ مِنْ كُلِّ جَسَدِهِ فَلِذَلِكَ وَجَبَ عَلَيْهِ تَطْهِيرُ جَسَدِهِ كُلِّهِ وَ عِلَّةُ التَّخْفِيفِ فِي الْبَوْلِ وَ الْغَائِطِ أَنَّهُ أَكْثَرُ وَ أَدْوَمُ‌[3] مِنَ الْجَن

Hadith.171 - Imam Ali ibn Musa Ar-Ridha (as) wrote to Muhammad ibn Sinan in response to his questions: 'The reason for the ghusl (ritual bath) of janabah (ritual impurity from sexual discharge) is for cleanliness, to purify a person from what has affected them and to cleanse their entire body, because janabah involves