Muwatta Malik #1346

Yahya related to me from Malik from Abdullah ibn Abi Bakr ibn Hazm from Amra bint Abd ar-Rahman that A'isha, the wife of the Prophet, may Allah bless him and grant him peace, said, "Amongst what was sent down of the Qur'an was 'ten known sucklings make haram' - then it was abrogated by 'five known sucklings'. When the Messenger of Allah, may Allah bless him and grant him peace, died, it was what is now recited of the Qur'an." Yahya said that Malik said, "One does not act on this."