Hamzah bin Amr al-Aslami (may Allah be pleased with him) narrates: The Messenger of Allah (peace and blessings be upon him) set out for the Battle of Tabuk, and on that journey his service (peace and blessings be upon him) was my responsibility. I looked at the skin of ghee and saw that only a little was left in it. I prepared food for the Prophet (peace and blessings be upon him), then placed the skin in the sun and went to sleep. I was woken by the gurgling sound of the skin, so I got up and held its mouth with my hand. The Messenger of Allah (peace and blessings be upon him), seeing me, said: "Had you left it, it would have flooded the whole valley with ghee."
Hadith Referenceالمعجم الكبير للطبراني / باب الحاء / 2980