Sunan At-Tirmidhi

Salim bin Abdullah narrated that :he had heard a man from Ash-Sham asking Abdullah bin Umar about Tamattu after Umrah until Hajj, so Abdullah bin Umar said: ""It is lawful."" The man from Ash-Sham said: ""But your father prohibited it."" So Abdullah bin Umar said: ""Is the order to follow my father or is the order (to follow) for the Messenger of Allah?"" The man said: ""Rather it is for the Messenger of Allah."" So he said: ""Indeed the Messenger of Allah did it