Narrated Al-Bara:

We were one-thousand-and-four-hundred persons on the day of Al-Hudaibiya (Treaty), and (at) Al- Hudaibiya (there) was a well. We drew out its water not leaving even a single drop. The Prophet (ﷺ) sat at the edge of the well and asked for some water with which he rinsed his mouth and then he threw it out into the well. We stayed for a short while and then drew water from the well and quenched our thirst, and even our riding animals drank water to their satisfaction.

حَدَّثَنَا مَالِكُ بْنُ إِسْمَاعِيلَ، حَدَّثَنَا إِسْرَائِيلُ، عَنْ أَبِي إِسْحَاقَ، عَنِ الْبَرَاءِ ـ رضى الله عنه ـ قَالَ كُنَّا يَوْمَ الْحُدَيْبِيَةِ أَرْبَعَ عَشْرَةَ مِائَةً، وَالْحُدَيْبِيَةُ بِئْرٌ فَنَزَحْنَاهَا حَتَّى لَمْ نَتْرُكْ فِيهَا قَطْرَةً، فَجَلَسَ النَّبِيُّ صلى الله عليه وسلم عَلَى شَفِيرِ الْبِئْرِ، فَدَعَا بِمَاءٍ فَمَضْمَضَ وَمَجَّ فِي الْبِئْرِ، فَمَكَثْنَا غَيْرَ بَعِيدٍ ثُمَّ اسْتَقَيْنَا حَتَّى رَوِينَا وَرَوَتْ ـ أَوْ صَدَرَتْ ـ رَكَائِبُنَا‏.‏