The Messenger of Allah ﷺ performed Hajj on its own.
حدثنا هشام بن عمار حدثنا عبد العزيز الدراوردي وحاتم بن إسمعيل عن جعفر بن محمد عن أبيه
أن رسول الله ﷺ أفرد الحج
No references are available.
Its chain of transmission is sahih. Busiri said, "This is a sahih chain, and its narrators are trustworthy." Its basis is found in Sahih Muslim, hadith no. 1218.