Muwatta Malik, Book 54, Hadith 11 (USC-MSA)

Malik related to me from Abdullah ibn Dinar from Abdullah ibn Umar that a man called the Messenger of Allah and said, "Messenger of Allah, what do you think about lizards?" The Messenger of Allah, may Allah bless him and grant him peace, said, "I do not eat them, and I do not forbid them."

وَحَدَّثَنِي مَالِكٌ، عَنْ عَبْدِ اللَّهِ بْنِ دِينَارٍ، عَنْ عَبْدِ اللَّهِ بْنِ عُمَرَ، أَنَّ رَجُلاً، نَادَى رَسُولَ اللَّهِ صلى الله عليه وسلم فَقَالَ يَا رَسُولَ اللَّهِ مَا تَرَى فِي الضَّبِّ فَقَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏ "‏ لَسْتُ بِآكِلِهِ وَلاَ بِمُحَرِّمِهِ ‏" ‏ ‏.‏

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also referenced under: Book 54, Hadith 1776 (In-Book)