Sahih Muslim
Sahih Muslim 162c
حَدَّثَنَا شَيْبَانُ بْنُ فَرُّوخَ، حَدَّثَنَا حَمَّادُ بْنُ سَلَمَةَ، حَدَّثَنَا ثَابِتٌ الْبُنَانِيُّ، عَنْ أَنَسِ بْنِ مَالِكٍ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم أَتَاهُ جِبْرِيلُ صلى الله عليه وسلم وَهُوَ يَلْعَبُ مَعَ الْغِلْمَانِ فَأَخَذَهُ فَصَرَعَهُ فَشَقَّ عَنْ قَلْبِهِ فَاسْتَخْرَجَ الْقَلْبَ فَاسْتَخْرَجَ مِنْهُ عَلَقَةً فَقَالَ هَذَا حَظُّ الشَّيْطَانِ مِنْكَ . ثُمَّ غَسَلَهُ فِي طَسْتٍ مِنْ ذَهَبٍ بِمَاءِ زَمْزَمَ ثُمَّ لأَمَهُ ثُمَّ أَعَادَهُ فِي مَكَانِهِ وَجَاءَ الْغِلْمَانُ يَسْعَوْنَ إِلَى أُمِّهِ - يَعْنِي ظِئْرَهُ - فَقَالُوا إِنَّ مُحَمَّدًا قَدْ قُتِلَ . فَاسْتَقْبَلُوهُ وَهُوَ مُنْتَقَعُ اللَّوْنِ . قَالَ أَنَسٌ وَقَدْ كُنْتُ أَرَى أَثَرَ ذَلِكَ الْمِخْيَطِ فِي صَدْرِهِ .
Shayban ibn Farrukh narrated to us: Hammad ibn Salama narrated to us; Thabit al-Bunani narrated to us, from Anas ibn Malik, that Gabriel (peace be upon him) came to the Messenger of Allah (peace and blessings be upon him) while he was playing with some boys. He seized him and laid him on the ground, then opened his chest and took out his heart. He extracted a clinging clot from it and said: This is Satan's share of you. Then he washed it in a gold basin with Zamzam water, joined it back together, and returned it to its place. The boys ran to his mother—that is, his wet nurse—and said: Muhammad has been killed! They came to him and found his color changed. Anas said: I used to see the trace of the seam on his chest.
Translation notes
The source explicitly identifies the woman called his mother as his wet nurse.