Srimad-Bhagavatam: Canto 5 - Chapter 1 - Verse 12

Sanskrit:

अथ कदाचित्कश्चिद् वृषलपतिर्भद्रकाल्यै पुरुषपशुमालभतापत्यकाम: ॥ १२ ॥

ITRANS:

atha kadācit kaścid vṛṣala-patir bhadra-kālyai puruṣa-paśum ālabhatāpatya-kāmaḥ.

Translation:

At this time, being desirous of obtaining a son, a leader of dacoits who came from a śūdra family wanted to worship the goddess Bhadra Kālī by offering her in sacrifice a dull man, who is considered no better than an animal.

Purport:

Low-class men such as śūdras worship demigods like Goddess Kālī, or Bhadra Kālī, 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.