When the Prophet ﷺ walked, it was as though he was leaning forward.
حدثنا وهب بن بقية أخبرنا خالد عن حميد
كان النبي ﷺ إذا مشى كأنه يتوكأ
No references are available.
[Its chain of transmission is sahih] Abu Shaykh narrated it in Akhlaq Nabi, page 93, from the hadith of Wahb bin Baqiyyah with this wording. Tirmidhi also narrated it, hadith no. 1754, from the hadith of Humayd Tawil with this wording, and he stated explicitly that he heard it directly, as recorded by Hakim, 4/280–281, who graded it sahih according to the standard of the two Shaykhs, and Dhahabi agreed with him.