Ibn Abi Mulaykah said: I heard Sayyidah Aishah (may Allah be pleased with her) say: The Messenger of Allah (peace and blessings be upon him) passed away on my day, in my house, and between my chest and my neck, and Allah joined my saliva with his (peace and blessings be upon him) saliva. She said: My brother Abd al-Rahman came in to me with a miswak, and the hand of the Prophet (peace and blessings be upon him) had grown weak, so I took that miswak and chewed it, then cleaned his (peace and blessings be upon him) teeth with it.
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 19387