Abdullah bin Abbas reported,

The Messenger of Allah ﷺ prayed the dawn prayer at Dhu Tuwa and arrived after four nights of Dhul-Hijjah had passed. He ordered his companions to change their state of consecration into an Umra, except for those who had brought sacrificial animals with them.

Muslim 3013

Sahih

و حدثنا عبد بن حميد أخبرنا عبد الرزاق أخبرنا معمر عن أيوب عن أبي العالية

عن ابن عباس رضي الله عنهما قال

صلى رسول الله ﷺ الصبح بذي طوى وقدم لأربع مضين من ذي الحجة وأمر أصحابه أن يحولوا إحرامهم بعمرة إلا من كان معه الهدي

مسلم 3013صحيح
Contents
Reference
Commentary
Ayat
Collection
Sahih Muslim
Book
Hajj
Chapter
Permissibility of Umrah during the months of Hajj
Numbering
Darussalam 3013
Muslim 3013