It is also narrated from Sayyiduna Jabir (may Allah be pleased with him) that they were eating dates on a shield. He said: "The Messenger of Allah (peace and blessings be upon him) passed by us, having come from relieving himself, so we said: 'Come!' So he (peace and blessings be upon him) sat down and ate the dates with us, and did not touch water."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب النكاح / 13414