Vaishnava Dharmashastra 23.44

23.44

mṛtapañcanakhāt kūpād atyantopahatāt tathā
apaḥ samuddharet sarvāḥ śeṣaṃ vastreṇa śodhayet //

From a well, in which a five-toed animal (whether man or beast, but not one of the five-toed animals whose flesh may be eaten), has died, or which has been defiled in the highest degree, he must take out all the waters and dry up the remainder with a cloth.