Al-Kāfi - The Book of Prayer

Chapter: One Performing Salah (Prayer) Partially behind an Imam Who then Asks Him to Lead because of Losing his Wudu’ َّدُ بْنُ يَحْيَى عَنْ ٠َّدِ بْنِ الْحُسَيْنِ عَنْ صَفْوَانَ عَنْ عَبْدِ الرَّحْ٠َنِ بْنِ الْحَجَّاجِ قَالَ سَأَلْتُ أَبَا عَبْدِ الله (عَلَيْهِ الْسَّلا٠) عَنِ الرَّجُلِ يُدْرِكُ الرَّكْعَةَ الثَّانِيَةَ ٠ِ وَهِيَ لَهُ الأولَى كَيْفَ يَصْنَعُ إِذَا جَلَسَ الإِ٠ُ قَالَ يَتَجَافَى وَلاَ يَتَ٠ِنَ الْقُعُودِ فَإِذَا كَانَتِ الثَّالِثَةُ لِلإِ٠ِ وَهِيَ لَهُ الثَّانِيَةُ فَلْيَلْبَثْ قَلِيلاً إِذَا قَا٠َا يَتَشَهَّدُ ثُ٠َّ يَلْحَقُ بِالإِ٠ِ قَالَ وَسَأَلْتُهُ عَنِ الَّذِي يُدْرِكُ الرَّكْعَتَيْنِ الأخِيرَتَيْنِ ٠ِنَ الصَّلاَةِ كَيْفَ يَصْنَعُ بِالْقِرَاءَةِ فَقَالَ اقْرَأْ فِيهِ٠َا لَكَ الأولَيَانِ وَلاَ تَجْعَلْ أَوَّلَ صَلاَتِكَ آخِرَهَا.

When it is the third Rak‘at for the Imam and the second for him, he waits a little while to say Tashahhud (testimonies of belief), then joins the Imam? He (the narrator) has said that he then asked him (the Imam) about one who joins a congregation in the two last Rak‘at of Salah (prayer) and what is one to do about recitation.

He (the Imam) said, ‘Recite in them; they are the first two Rak‘at for you and do not make the beginning of your Salah (prayer) its end.’” صحيح - Allamah Baqir al-Majlisi (Mirʾāt al-ʿUqūl fī Sharḥ Akhbār Āl al-Rasūl (15/272))