What are the most authentic narrations regarding the death of the Prophet, may God's prayers and peace be upon him, and was Aisha, may God be pleased with her, alone with him?

More than one person came to the Messenger of Allah, peace and blessings be upon him, during his death illness. Among them was Abd al-Rahman ibn Abi Bakr, to whom the Messenger of Allah, peace and blessings be upon him, gestured to take the siwak he had in his hand. Aisha chewed on it and prepared it, and the Messenger used it to clean his teeth. Fatimah also came to him and said, "Oh, the distress of my father!" So he said, "There is no distress upon your father after today." It is not confirmed whether they remained with him until his death or left.