Ayesha said, during his illness, the Messenger of Allah ﷺ kept asking, "Where will I be tomorrow? Where will I be tomorrow?" eager for the day he would spend with Ayesha. When my day came, Allah took his soul while he rested between my chest and throat, and he was buried in my house.
إن كان رسول الله ﷺ ليتعذر في مرضه: أين أنا اليوم، أين أنا غدا؟ استبطاء ليوم عائشة، فلما كان يومي قبضه الله بين سخري ونحري ودفن في بيتي.
Bukhari related it in The Book of Funerals (1389), and Muslim in The Merits of the Companions (2443:84), both through chains from Hisham bin Urwa, from his father, from Ayesha, and I have mentioned it as narrated, with the wording being Bukhari's. Muslim's wording has, "so that he might check." Her saying, "my sahr," refers to the lung and what is connected to it, meaning that he died while leaning against her chest, between her bosom and her neck.