Hadithcore
Sahih al-Bukhari, 4840
sahih

Narrated Jabir:

We were one thousand and four hundred on the Day of Al-Hudaibiya.

حَدَّثَنَا قُتَيْبَةُ بْنُ سَعِيدٍ، حَدَّثَنَا سُفْيَانُ، عَنْ عَمْرٍو، عَنْ جَابِرٍ، قَالَ كُنَّا يَوْمَ الْحُدَيْبِيَةِ أَلْفًا وَأَرْبَعَمِائَةٍ‏.‏

References2 variants
In-Book Reference
Book 65, Hadith 361
USC-MSA web (English) reference
Vol. 6, Book 60, Hadith 364 (deprecated numbering scheme)