923 - وَقَالَ اَلرِّضَا عَلَيْهِ اَلسَّلاَمُ: «إِنَّمَا جُعِلَ اَلْقِرَاءَةُ فِي اَلرَّكْعَتَيْنِ اَلْأَوَّلَتَيْنِ وَ اَلتَّسْبِيحُ فِي اَلْأَخِيرَتَيْنِ لِلْفَرْقِ بَيْنَ مَا فَرَضَهُ اَللَّهُ عَزَّ وَ جَلَّ مِنْ عِنْدِهِ وَ بَيْنَ مَا فَرَضَهُ اَللَّهُ تَعَالَى مِنْ عِنْدِ رَسُولِ اَللَّهِ صَلَّى اَللَّهُ عَلَيْهِ وَ آلِهِ.
Hadith.923 - Imam al-Ridha 
said:
"The reason why recitation is required in the first two rak‘ahs and glorification (tasbih) in the last two rak‘ahs of the prayer is to distinguish between what Allah (swt), the Exalted, has ordained from Himself and what He has commanded through His Messenger”.
