Abu Zubayr reported,

He heard Jabir being asked how many they were on the day of Hudaybiya.Jabir replied, "We were fourteen hundred. We pledged allegiance to him while Umar held his hand beneath the tree, an acacia. All of us pledged except Jadd bin Qays Ansari, who hid himself under the belly of his camel."

Muslim 4809

Sahih

و حدثنا محمد بن حاتم حدثنا حجاج عن ابن جريج

أخبرني أبو الزبير

سمع جابرا يسأل كم كانوا يوم الحديبية قال كنا أربع عشرة مائة فبايعناه وعمر آخذ بيده تحت الشجرة وهي سمرة فبايعناه غير جد بن قيس الأنصاري اختبأ تحت بطن بعيره

مسلم 4809صحيح
Contents
Reference
Commentary
Ayat
Collection
Sahih Muslim
Book
Leadership
Chapter
Recommendation of pledging allegiance to the commander of the army when intending to fight, and description of the pledge of Ridwan under the tree
Numbering
Darussalam 4809
Muslim 4809