1230. hadíth
وَقَالَ أَمِيرُ اَلْمُؤْمِنِينَ عَلَيْهِ اَلسَّلاَمُ: «لاَ كَلاَمَ وَ اَلْإِمَامُ يَخْطُبُ وَ لاَ اِلْتِفَاتَ إِلاَّ كَمَا يَحِلُّ فِي اَلصَّلاَةِ وَ إِنَّمَا جُعِلَتِ اَلْجُمُعَةُ رَكْعَتَيْنِ مِنْ أَجْلِ اَلْخُطْبَتَيْنِ جُعِلَتَا مَكَانَ اَلرَّكْعَتَيْنِ اَلْأَخِيرَتَيْنِ فَهِيَ صَلاَةٌ حَتَّى يَنْزِلَ اَلْإِمَامُ.
The Commander of the Faithful Imam Ali ibn Abi Talib (a.s) said: "There is to be no speaking while the Imam is delivering the sermon, and no turning around except as is permissible during prayer. The Jumu’ah prayer was made two rak'ahs because of the two sermons, which have taken the place of the last two rak'ahs. Therefore, it remains as part of the prayer until the Imam descends (finishes the sermon)."