4ـ مُحَمَّدُ بْنُ يَحْيَى عَنْ أَحْمَدَ بْنِ مُحَمَّدٍ عَنْ مُحَمَّدِ بْنِ سِنَانٍ عَنِ الْحُسَيْنِ بْنِ الْمُخْتَارِ عَنْ أَبِي بَصِيرٍ عَنْ أَبِي عَبْدِ الله (عَلَيهِ السَّلام) قَالَ
إِنَّ الْقَلْبَ لَيَتَرَجَّجُ فِيمَا بَيْنَ الصَّدْرِ وَالْحَنْجَرَةِ حَتَّى يُعْقَدَ عَلَى الإيمَانِ فَإِذَا عُقِدَ عَلَى الإيمَانِ قَرَّ وَذَلِكَ قَوْلُ الله عَزَّ وَجَلَّ وَمَنْ يُؤْمِنْ بِالله يَهْدِ قَلْبَهُ.
4. Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad from Muhammad ibn Sinan from al-Husayn ibn al-Mukhtar from abu Basir from Abu ‘Abdillah 
who has said the following:
“The heart vibrates between the chest and the throat until it forms belief, when it does so it rests as is in the words of Allah, the Most Majestic, the Most Holy, ‘Whoever believes in Allah his heart calms down.’” (64:11)
