Adding rak'ahs to an obligatory prayer

✅Answer: Please pay attention to the following narrations:

1 عَنْ عَلِيِّ بْنِ إِبْرَاهِيمَ عَنْ أَبِيهِ عَنِ ابْنِ أَبِي عُمَيْرٍ عَنِ ابْنِ أُذَيْنَةَ عَنْ زُرَارَةَ وَ بُكَيْرٍ ابْنَيْ أَعْيَنَ عَنْ أَبِي جَعْفَرٍ قَالَ: إِذَا اسْتَيْقَنَ أَنَّهُ زَادَ فِي صَلَاتِهِ الْمَكْتُوبَةِ رَكْعَةً لَمْ يَعْتَدَّ بِهَا وَ اسْتَقْبَلَ صَلَاتَهُ اسْتِقْبَالًا إِذَا كَانَ قَدِ اسْتَيْقَنَ يَقِيناً.

📚Al-Kafi, Vol. 3, p. 354

Imam Baqir (peace be upon him) said: 'If he is certain that he has added a rak'ah to an obligatory prayer, he should not count it and should start the prayer over, if he is completely certain!'

2 عَنْ عَلِيِّ بْنِ مَهْزِيَارَ عَنْ فَضَالَةَ بْنِ أَيُّوبَ عَنْ أَبَانِ بْنِ عُثْمَانَ عَنْ أَبِي بَصِيرٍ قَالَ: قَالَ أَبُو عَبْدِ اللَّهِ مَنْ زَادَ فِي صَلَاتِهِ فَعَلَيْهِ الْإِعَادَةُ.

📚Al-Tahdhib, Vol. 2, p. 194

Imam Sadiq (peace be upon him) said: 'Whoever adds to his prayer, it is his duty to repeat his prayer.'

3 عَنْ أَحْمَدَ بْنِ مُحَمَّدٍ عَنِ الْحَسَنِ بْنِ عَلِيِّ بْنِ فَضَّالٍ عَنْ أَبِي جَمِيلَةَ عَنْ زَيْدٍ الشَّحَّامِ قَالَ: سَأَلْتُهُ عَنِ الرَّجُلِ صَلَّى الْعَصْرَ سِتَّ رَكَعَاتٍ أَوْ خَمْسَ رَكَعَاتٍ قَالَ إِنِ اسْتَيْقَنَ أَنَّهُ صَلَّى خَمْساً أَوْ سِتّاً فَلْيُعِدْ الْحَدِيثَ.

📚Al-Tahdhib, Vol. 2, p. 352

Zayd al-Shahham said: 'I asked Imam Sadiq (peace be upon him) about a person who has performed the Asr prayer as six or five rak'ahs.' The Imam said: 'If he is certain that he has performed five or six rak'ahs, he must repeat it!'

✅From the above narrations, it is completely clear that if a person is certain that he has added rak'ahs to his obligatory prayer, he must repeat his prayer.

✅For the ruling on doubting between four and five rak'ahs in a four-rak'ah prayer, please see the following link:

https://feghh14.com/en/448

اللَّهُمَّ صَلِّ عَلَی مُحَمَّدٍ وَ آلِ مُحَمَّدٍ

وَ عَجِّلْ لِوَلِیِّکَ الْفَرَجَ وَ الْعَافِیَةَ وَ النَّصْرَ