Chukat, Hukath, or Chukkas, is the 39th weekly Torah portion (, "parashah") in the annual Jewish cycle of Torah reading and the sixth in the Book of Numbers, the parashah sets out the law of purification with the water of lustration prepared with the Red Cow, also called the “Red Heifer”, was a cow brought to the priests as a sacrifice according to what book?
Chukat: Chukat, Hukath, or Chukkas ( — Hebrew for "decree," the ninth word, and the first distinctive word, in the parashah) is the 39th weekly Torah portion (, "parashah") in the annual Jewish cycle of Torah reading and the sixth in the Book of Numbers. Red heifer: The red heifer (Hebrew: פָרָ֨ה אֲדֻמָּ֜ה‎ ; "para adumma"), also known as the red cow, was a cow brought to the priests as a sacrifice according to the Hebrew Bible, and its ashes were used for the ritual purification of "Tum'at HaMet" ("the impurity of the dead"), that is, an Israelite who had come into contact with a corpse.
Hebrew Bible