Sahih al-Bukhari 1617
صحيح البخاري#1617SahihNarrated Ibn `Umar:When the Prophet (ﷺ) performed the Tawaf of the Ka`ba, he did Ramal during the first three rounds and in the last four rounds he used to walk and while doing Tawaf between Safa and Marwa, he used to run in the midst of the rain water passage
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Every narration in Sahih al-Bukhari is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 25:102