atha kadacit kascid vrsala-patir bhadra-kalyai purusa-pasum alabhatapatya-kamah.
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
At this time, being desirous of obtaining a son, a leader of dacoits who came from a sudra family wanted to worship the goddess Bhadra Kali by offering her in sacrifice a dull man, who is considered no better than an animal.
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
Low-class men such as sudras worship demigods like Goddess Kali, or Bhadra Kali, for the fulfillment of material desires. To this end, they sometimes kill a human being before the deity. They generally choose a person who is not very intelligent — in other words, an animal in the shape of a man.