Musannaf Ibn Abi Shayba 16:125

Abu Bakr narrated to us, he said: Waki’ narrated to us, from Sufyan, from Ziyad ibn ‘Alaqah, from Sa’d ibn Ma’bad, that ‘Umar saw a man from [the tribe of] Muharib who was fat during a year of famine. He said: "What is your food?" He said: "Dhabbs (lizards)." He said: "I wish that for every dhabb burrow, I had two dhabbs."