The Messenger of Allah (ﷺ) was asked in the expedition of Tabuk about the sutra the worshipper; he said: Like the back of the saddle.
Sahih Muslim Book 4, Hadith 276
← Previous Hadith The Messenger of Allah (ﷺ) was asked about sutra of a worshipper; he said: Equal to the back of the saddle.

Sahih Muslim Book 4, Hadith 275 Next Hadith → When the Messenger of Allah (may peace he upon him) went out on the 'Id day, he ordered to carry a spear-and it was fixed in front of him, and he said prayer towards its (direction), and the people were behind him. And he did it in the journey, and that is the reason why the Amirs carried it.

Sahih Muslim Book 4, Hadith 277