Musnad Ahmad 27:806

Waki' narrated to us, from Sufyan, from Abdullah ibn Dinar and al-Umari, from Nafi', from Ibn Umar, who said: The Messenger of Allah (peace and blessings of Allah be upon him) was asked about the dabb (spiny-tailed lizard). He said: "I do not eat it, nor do I forbid it."