Mistake in Sujud (prostrations)

سُئِلَ أَبُو عَبْدِ اللَّهِ ع عَنْ رَجُلٍ سَهَا فَلَمْ يَدْرِ سَجْدَةً سَجَدَ أَمْ ثِنْتَيْنِ قَالَ يَسْجُدُ أُخْرَى وَ لَيْسَ عَلَيْهِ بَعْدَ انْقِضَاءِ الصَّلَاةِ سَجْدَتَا السَّهْوِ.

“Abu ’Abd Allah (a.s.), was asked about a man who becomes confused and does not know if he has done one or two Sajdah (prostrations). He (the Imam) said, ’He performs another Sajdah (prostration) and after completion of Salah (prayer) two Sajdah (prostration) because of mistake is not necessary.’”

سَأَلْتُ أَبَا عَبْدِ اللَّهِ ع عَنْ رَجُلٍ شَكَّ فَلَمْ يَدْرِ سَجْدَةً سَجَدَ أَمْ سَجْدَتَيْنِ قَالَ يَسْجُدُ حَتَّى يَسْتَيْقِنَ أَنَّهُمَا سَجْدَتَانِ.

“I once asked abu ’Abd Allah (a.s.), about a man who doubts and does not know if he has performed one or two Sajdah (prostrations). He (the Imam) said, ‘He performs Sajdah (prostration) to ascertain that it is two Sajdah (prostrations).”’

سَأَلْتُهُ عَنْ رَجُلٍ صَلَّى رَكْعَةً ثُمَّ ذَكَرَ وَ هُوَ فِي الثَّانِيَةِ وَ هُوَ رَاكِعٌ أَنَّهُ تَرَكَ سَجْدَةً مِنَ الْأُولَى فَقَالَ كَانَ أَبُو الْحَسَنِ ص يَقُولُ إِذَا تَرَكْتَ السَّجْدَةَ فِي الرَّكْعَةِ الْأُولَى وَ لَمْ تَدْرِ وَاحِدَةً أَمْ ثِنْتَيْنِ اسْتَقْبَلْتَ الصَّلَاةَ حَتَّى يَصِحَّ لَكَ أَنَّهُمَا اثْنَتَانِ.

“I once asked abu al-Hassan (a.s.), about a man who performs one Rak’at of Salah (prayer), then he remembers in the second Rak’at in Ruku’ (bowing down on one’s knees) position that he has omitted one Sajdah (prostration) of the first Rak’at. He said, ‘Abu al-Hassan (a.s.), would say that if you omit Sajdah (prostratio

فِي رَجُلٍ شُبِّهَ عَلَيْهِ وَ لَمْ يَدْرِ وَاحِدَةً سَجَدَ أَمْ ثِنْتَيْنِ قَالَ فَلْيَسْجُدْ أُخْرَى.

“About a man who doubts and does not know if he has performed one or two Sajdah (prostrations), abu ‘Abd Allah (a.s.), has said, ‘He performs one more Sajdah (prostration).”’