The opening of the chest

While he is playing with other boys, Gabriel comes to him, opens his chest and washes his heart with Zamzam water. Worried, Haleemah returns him to his mother.

As the book dates it: while with Haleemah (age four or five)

Who was there

• HHaleemah as-Sa’diyahThe Bedouin wet nurse who raised the Prophet ﷺ in the desert until he was four or five.
• GGabriel (Jibril)The angel who brought the revelation to the Prophet ﷺ.