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 (a.s.) 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)