Mutarrif said: Imran bin Husayn (may Allah be pleased with him) said: I am narrating a hadith to you; perhaps Allah Almighty will benefit you by it after this day. Know that the Messenger of Allah (peace and blessings be upon him) had some of his family perform Umrah in the first ten days of Dhu al-Hijjah, and no Qur'an was revealed abrogating it. Now let whoever wishes form whatever opinion he likes.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحج / 8731