'Pair' in the Bible

Elijah went from there and found Elisha son of Shaphat. He was plowing with twelve pairs of oxen; he was near the twelfth pair. Elijah passed by him and threw his robe over him.

Elisha went back and took his pair of oxen and slaughtered them. He cooked the meat over a fire that he made by burning the harness and yoke. He gave the people meat and they ate. Then he got up and followed Elijah and became his assistant.