Musnad Ahmad 167:0

Narrated to us by Yahya ibn Sa’id, from Muhammad ibn ‘Amr, from Abu Salamah, from al-Dahhak ibn Sufyan al-Kilabi, that the Messenger of Allah (ﷺ) said to him: "O Dahhak, what is your food?" He said: "O Messenger of Allah, it is camel meat and milk." He said: "Then what does it become?" He said: "It becomes what you know." He said: "Verily, Allah, the Mighty and Majestic, has set forth the food of the son of Adam as an example for the world."