Musnad Abu Ya'la al-Mawsili 150:184

Abu Kurayb narrated to us, Muhammad ibn Zayd narrated to us, from Rushdin ibn Sa’d, from Yazid ibn al-Had, from Musa ibn Sarjas, from al-Qasim ibn Muhammad, from ‘Aishah, who said: I saw the Messenger of Allah, may Allah bless him and grant him peace, while he was dying, and beside him was a vessel containing water. He would insert his hand into it and wipe his face, then say: "O Allah, assist me against the agonies of death."