Musannaf Ibn Abi Shayba 23:205

Abu Mu'awiyah narrated to us, from al-A'mash, from Shaqiq, from Masruq, from 'Aishah, who said: "I saw myself upon a hill, as if there were cows around me being slaughtered." Masruq said: "If you are able not to be one of them, then do so." She was tested with that, may Allah have mercy on her.