Sahih al-Bukhari #4187 · Military Expeditions led by the Prophet (pbuh) (Al-Maghaazi)

"The people were along with the Prophet (ﷺ) on the day of Al-Hudaibiya spreading in the shade of the trees. Suddenly the people surrounded the Prophet (ﷺ) and started looking at him." 'Umar said, "O 'Abdullah! Go and see why the people are encircling Allah's Apostle and looking at him." 'Abdullah bin 'Umar then saw the people giving the Pledge o allegiance to the Prophet. So he also gave the Pledge of allegiance and returned to 'Umar who went out in his turn and gave the Pledge of allegiance to the Prophet