٤ـ مُحَمَّدُ بْنُ يَحْيَى عَنْ أَحْمَدَ بْنِ مُحَمَّدٍ عَنِ الْحُسَيْنِ بْنِ سَعِيدٍ عَنْ فَضَالَةَ بْنِ أَيُّوبَ عَنْ أَبِي الْمَغْرَاءِ عَنْ أَبِي بَصِيرٍ عَنْ أَبِي عَبْدِ الله (عَلَيْهِ الْسَّلام) قَالَ قَالَ أَمِيرُ الْمُؤْمِنِينَ (صلّى اللهُ عَلَيْهِ وَآلِه) مَنْ لَمْ يُقِمْ صُلْبَهُ فِي الصَّلاَةِ فَلاَ صَلاَةَ لَهُ.
4. Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad from al-Husayn ibn Sa‘id from Fadalah ibn Ayyub from abu al- Mighra’ from abu Basir who has said the following: “Abu ‘Abd Allah , has said that ’Amir al-Mu’minin has said, ‘One who does not straighten his back during Salah (prayer), his Salah (prayer) is not valid.’” 