Anas bin Malik reported,

The Prophet ﷺ prayed Dhuhr in Medina as four units and Asr at Dhu al-Hulayfah as two units, and he spent the night there. When morning came, he mounted his riding camel and began declaring the oneness of Allah and glorifying Him. When he ascended the high ground of al-Bayda, he pronounced the talbiyah for both Hajj and Umrah together. Upon entering Mecca, he ordered his companions to release themselves from the state of ihram. The Prophet ﷺ slaughtered seven sacrificial camels with his own hand while they were standing, and in Medina he sacrificed two horned rams of mixed black and white color.

Bukhari 1714

Sahih

حدثنا سهل بن بكار حدثنا وهيب عن أيوب عن أبي قلابة

عن أنس رضي الله عنه قال

صلى النبي ﷺ الظهر بالمدينة أربعا والعصر بذي الحليفة ركعتين فبات بها فلما أصبح ركب راحلته فجعل يهلل ويسبح فلما علا على البيداء لبى بهما جميعا فلما دخل مكة أمرهم أن يحلوا ونحر النبي ﷺ بيده سبع بدن قياما وضحى بالمدينة كبشين أملحين أقرنين

البخاري 1714صحيح
Contents
Reference
Commentary
Ayat
Collection
Sahih Bukhari
Book
Hajj
Chapter
Slaughtering sacrificial camels while standing
Numbering
Darussalam 1714
Bukhari 1714