Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) says that the Messenger of Allah (peace and blessings be upon him) and Sayyiduna Khalid bin al-Walid (may Allah be pleased with him) were in the house of Sayyidah Maymunah (may Allah be pleased with her) when lizard (dabb) meat was brought to them. Sayyidah Maymunah (may Allah be pleased with her) said: Tell the Messenger of Allah (peace and blessings be upon him) what it is. When the Messenger of Allah (peace and blessings be upon him) was told that it was lizard, he (peace and blessings be upon him) left it. Sayyiduna Khalid (may Allah be pleased with him) asked: O Messenger of Allah, is it unlawful? He (peace and blessings be upon him) said: "It is not unlawful, but I keep away from it." Then Sayyiduna Khalid (may Allah be pleased with him) took its bones and began sucking them.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الضحايا / 19415