Vaishnava Dharmashastra 51.6

51.6

śaśakaśalyakagodhākhaḍgakūrmavarjaṃ pañcanakhamāṃsāśane saptarātram upavaset ||

If a man has (unawares) eaten meat of a fivetoed animal, with the exception of the hare, the porcupine, the iguana, the rhinoceros, and the tortoise, he must fast for seven days.