Al-Kāfi - The Book of Belief and Disbelief

Al-Kāfi - The Book of Belief and Disbelief Chapter: Creation of the Creatures with Belief in Oneness of Allah in Their Nature َّدُ بْنُ يَحْيَى عَنْ أَحْ٠َحْبُوبٍ عَنْ عَلِيِّ بْنِ رِئَابٍ عَنْ زُرَارَةَ قَالَ سَأَلْتُ أَبَا عَبْدِ الله (عَلَيهِ السَّلا٠) عَنْ قَوْلِ الله عَزَّ وَجَلَّ فِطْرَتَ الله الَّتِي فَطَرَ النَّاسَ عَلَيْها قَالَ فَطَرَهُ٠ِيعاً عَلَى التَّوْحِيدِ.

the creation (and invention) of Allah (had a certain) nature with which He created all people....’ (30:30) The Imam said, ‘He created them and placed belief in Oneness of Allah in the nature of every one of them.’” صحيح - Allamah Baqir al-Majlisi (Mirʾāt al-ʿUqūl fī Sharḥ Akhbār Āl al-Rasūl (7/57))