Shama-il Tirmidhi Chapter 025, Hadith Number 029 (171).

Hazrat Jabir radiyallahu anhu says, Rasoolullah sallallahu alaihe wasallam once went to the house of a woman from among the Ansaar. I also accompanied him. The hostess slaughtered a goat for Rasoolullah sallallahu alaihe wasallam. He ate some meat from it. She then served a tray of fresh dates. Rasoolullah sallallahu alaihe wasallam ate some from it also. He then performed wudhu for Zuhr and performed the Zuhr salaah. After returning from the salaah she served from the remaining meat. Rasoolullah sallallahu alaihe wasallam ate from it. He did not perform wudhu for the Asr salaah (and performed salaah with the previous wudhu).

Commentary.
It can be argued from this hadith that it is not necessary to perform wudhu after eating something that has been cooked on a fire. Proof may also be obtained from this hadith that Sayyidina Rasoolullah sallallahu alaihe wasallam ate twice in a day. For this reason it could be said that where it has been narrated that Sayyidina Rasoolullah sallallahu alaihe wasallam ate only once a day, it may have been said according to the knowledge of the narrator. It may also be said that in those narrations, the filling of the stomach twice has been denied, but eating twice has not been denied. A little may have been eaten the second time.

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