Srimad Bhagavadam 4.19.36
In Calcutta there are many butcher shops which keep a deity of the goddess Kālī, and animal-eaters think it proper to purchase animal flesh from such shops in hope that they are eating the remnants of food offered to the goddess Kālī. They do not know that the goddess Kālī never accepts nonvegetarian food because she is the chaste wife of Lord Śiva. Lord Śiva is also a great Vaiṣṇava and never eats nonvegetarian food, and the goddess Kālī accepts the remnants of food left by Lord Śiva. Therefore there is no possibility of her eating flesh or fish. Such offerings are accepted by the associates of the goddess Kālī known as bhūtas, piśācas and Rākṣasas, and those who take the prasāda of the goddess Kālī in the shape of flesh or fish are not actually taking the prasāda left by the goddess Kālī, but the food left by the bhūtas and piśācas.
