Abu Jamra reported,

I performed tamattu, but some people forbade me from doing so. So I went to Ibn Abbas and asked him about it, and he instructed me to proceed with it.Then I set off toward the House and fell asleep. Someone came to me in my dream and said, "An accepted Umra and a blessed Hajj."I went to Ibn Abbas and told him what I had seen, and he exclaimed, "Allah is the Greatest! Allah is the Greatest! This is the Sunnah of Abu Qasim ﷺ."

Muslim 3015

Sahih

حدثنا محمد بن المثنى وابن بشار قالا حدثنا محمد بن جعفر حدثنا شعبة قال سمعت

أبا جمرة الضبعي قال

تمتعت فنهاني ناس عن ذلك فأتيت ابن عباس فسألته عن ذلك فأمرني بها قال ثم انطلقت إلى البيت فنمت فأتاني آت في منامي فقال عمرة متقبلة وحج مبرور قال فأتيت ابن عباس فأخبرته بالذي رأيت فقال الله أكبر الله أكبر سنة أبي القاسم ﷺ

مسلم 3015صحيح
Contents
Reference
Commentary
Ayat
Collection
Sahih Muslim
Book
Hajj
Chapter
Permissibility of Umrah during the months of Hajj
Numbering
Darussalam 3015
Muslim 3015