Al Nuayman ibn Amr gifted some food to the Prophet Muhammad (saw) :)

http://en.wikipedia.org/wiki/Al-Nuayman_ibn_Amr

Once an-Nuayman went to the suq and saw some food being sold which appeared to be tasty and delightful. He ordered some and sent it to the Prophet as if it were a gift from him. The Prophet was delighted with the food and he and his family ate of it. The vendor of the food then came to an-Nuayman to collect the price of it and an-Nuayman said to him: "Go to the Messenger of God it was for him. He and his family ate it."

The vendor went to the Prophet who in turn asked an-Nuayman: "Didn't you give it to me?" "Yes," said an-Nuayman. "I thought you would like it and I wanted you to eat some of it so I had it presented to you. But I don't have any dirhams to pay the vendor for it. So, pay, O Messenger of God!"
The Prophet had a good laugh and so did his companions. The laugh was at his expense, literally, for he had to pay the price of the unsolicited gift. An-Nuayman felt that two benefits came out of the incident: the Prophet and his family ate food that they enjoyed and the Muslims had a good laugh.