Anas bin Malik reported,

Jibril came to the Messenger of Allah ﷺ while he was playing with the other boys. He took hold of him, threw him to the ground, and split open his chest. He extracted the heart and removed from it a clot, saying, "This is Satan's portion of you." Then he washed it in a basin of gold with Zamzam water, sealed it back together, and returned it to its place.The boys came running to his mother, meaning his foster mother, and said, "Muhammad has been killed!" They went out to meet him and found him pale in color.Anas said, "I used to see the mark of that stitching on his chest."

Azami 13746

Sahih

عن أنس بن مالك

أن رسول الله ﷺ أتاه جبريل، وهو يلعب مع الغلمان. فأخذه فصرعه فشق عن قلبه. فاستخرج القلب، فاستخرج منه علقة فقال: هذا حظ الشيطان منك، ثم غسله في طست من ذهب بماء زمزم، ثم لأمه، ثم أعاده في مكانه. وجاء الغلمان يسعون إلى أمه (يعني ظره) فقالوا: إن محمدا قد قتل، فاستقبلوه وهو منتقع اللون. قال أنس: وقد كنت أرى أثر ذلك المخيط في صدره.

الأعظمي 13746صحيح
Contents
Reference
Commentary
Ayat
Collection
Jami al-Kamil
Book
Tafsir of the great Quran
Chapter
Tafsir of Surah Sharh
Section
His saying, "Did We not expand for you your breast, and We removed from you your burden, which had weighed upon your back"
Numbering
Jami al-Kamil 13746 (2nd edition)
Azami 13746