Albert Barnes Commentary 1 Kings 19:21

"And he returned from following him, and took the yoke of oxen, and slew them, and boiled their flesh with the instruments of the oxen, and gave unto the people, and they did eat. Then he arose, and went after Elijah, and ministered unto him." — 1 Kings 19:21 (ASV)

Elisha returns to his oxen and laborers. He signals his relinquishment of his home and former calling by slaughtering the specific yoke of oxen he had been plowing with—likely the best of the twelve animals—and by burning the farming instruments, the plows and yokes, which were made of wood.

Next, he holds a feast for his people to show his gratitude for his call, while Elijah apparently remained nearby. Then, leaving his father and mother, cattle and land, a good position, and a comfortable home, Elisha became the attendant to the wanderer. This is comparable to the roles described in Exodus 24:13 and Joshua 1:1.