Sayyiduna Salamah bin al-Akwa' (may Allah be pleased with him) narrates: We fought against Hawazin with the Prophet (peace and blessings be upon him), and we suffered severe hardship, to the point that we resolved to slaughter some of our mounts. The Prophet of Allah (peace and blessings be upon him) said: "Gather some of your provisions." So the Prophet of Allah (peace and blessings be upon him) ordered that a leather mat be spread, and it was spread. The people brought dates and poured them onto it. I looked at it to estimate how much it was, and it was about the size of a resting goat. We all ate together until we were full, while we were fourteen hundred people, and then we filled our saddlebags from it. Then the Prophet of Allah (peace and blessings be upon him) called for a little water from a vessel and ordered that it be poured into a bowl, and we began performing ablution with it until all of us had performed ablution.
Hadith Referenceالمعجم الكبير للطبراني / باب السين / 6217