Sahih Muslim 5028
The Book of Hunting, Slaughter, and what may be Eaten
وَحَدَّثَنَا قُتَيْبَةُ بْنُ سَعِيدٍ، حَدَّثَنَا لَيْثٌ، ح وَحَدَّثَنِي مُحَمَّدُ بْنُ رُمْحٍ، أَخْبَرَنَا اللَّيْثُ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، قَالَ سَأَلَ رَجُلٌ رَسُولَ اللَّهِ صلى الله عليه وسلم عَنْ أَكْلِ الضَّبِّ فَقَالَ " لاَ آكُلُهُ وَلاَ أُحَرِّمُهُ " .
Ibn 'Umar reported:A person asked Allah's Messenger (ﷺ) about the eating of the lizard, whereupon he said. I neither eat it, nor do I prohibit it
Text from the public-domain hadith-api dataset. Numbering follows that dataset and can differ by a few from some printed editions — check the wording, not only the number.