Sahih Muslim Book 4, Hadith Number 1304.

Chapter : Desirability of observing the noon prayer at the earlier hour (of times prescribed for it) when there is no intense heat.

Rafi’ b. Khadija reported: We used to say the afternoon prayer with the Messenger of Allah (may peace be upon him), and then the camel was slaughtered and ten parts of it were distributed; then it was cooked and then we ate this cooked meat before the sinking of the sun.