أَحْمَدُ بْنُ مُحَمَّدٍ عَنِ ابْنِ مَحْبُوبٍ عَنْ أَبِي أَيُّوبَ عَنْ مُحَمَّدِ بْنِ مُسْلِمٍ عَنْ أَبِي جَعْفَرٍ ع قَالَ:
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إِذَا اعْتَكَفَ يَوْماً وَ لَمْ يَكُنِ اشْتَرَطَ فَلَهُ أَنْ يَخْرُجَ وَ يَفْسَخَ الِاعْتِكَافَ وَ إِنْ أَقَامَ يَوْمَيْنِ وَ لَمْ يَكُنِ اشْتَرَطَ فَلَيْسَ لَهُ أَنْ يَفْسَخَ اعْتِكَافَهُ حَتَّى يَمْضِيَ ثَلَاثَةُ أَيَّامٍ.
Read English translationHide English translationMuhammad Sarwar — attributed by Thaqalayn
3. Ahmad ibn Muhammad from has narrated from ibn Mahbub from abu Ayyub from Muhammad ibn Muslim who has said the following: “Abu Ja‘far (a.s.), has said, ‘If one remains in Ttikaf for one day without setting a condition, he can leave and depart the ’ Ttikaf but if one remains in ’Ttikaf for two days without condition being set, he then cannot leave out the ’Ttikaf; until three days are complete.’”
Translation: Muhammad Sarwar — attributed by Thaqalayn·The Arabic above is the original.
Hadith gradings
1- صحيحAllamah Baqir al-MajlisiMirʾāt al-ʿUqūl fī Sharḥ Akhbār Āl al-Rasūl (6/432)