Musnad Ahmad 2626

It was narrated that a man said: I heard Ibn 'Abbas (رضي الله عنه) say: The Messenger of Allah (ﷺ) and his companions came on the fourth day of Dhul-Hijjah, entering ihram with the intention of Hajj, then he instructed them to make it ‘Umrah, except for those who had a sacrificial animal with them. He said: Regular clothing was worn (after 'Umrah) and incense was burned, and relations were had with wives.