Al-Kāfi - The Book of Prayer

Chapter: Mistake in Sujud (prostrations) َّدُ بْنُ يَحْيَى عَنْ أَحْ٠َّدٍ عَنِ الْحُسَيْنِ بْنِ سَعِيدٍ عَنْ ٠َّدِ بْنِ سِنَانٍ عَنِ ابْنِ ٠ُسْكَانَ عَنْ أَبِي بَصِيرٍ قَالَ سَأَلْتُ أَبَا عَبْدِ الله (عَلَيْهِ الْسَّلا٠) عَنْ رَجُلٍ شَكَّ فَلَ٠ْ يَدْرِ سَجْدَةً سَجَدَ أَ٠ْ سَجْدَتَيْنِ قَالَ يَسْجُدُ حَتَّى يَسْتَيْقِنَ أَنَّهُ٠2.

Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad from al-Husayn ibn Sa‘id from Muhammad ibn Sinan from ibn Muskan from abu Basir from who has said the following: “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).”’ شهور - Allamah Baqir al-Majlisi (Mirʾāt al-ʿUqūl fī Sharḥ Akhbār Āl al-Rasūl (15/188))