What the Bible says about Oxen
(From Forerunner Commentary)
The imagery of the bullock is of patient, untiring, and successful labor in service to others. Proverbs 14:4 confirms this, "Where no oxen are, the trough is clean; but much increase comes by the strength of an ox." History shows that oxen will literally work themselves to death. Likewise, we have seen Jesus' devotion to the death in fulfilling God's will for Him, and II Corinthians 11 provides a long list of Paul's labors under frequent duress in fulfilling his calling.
John W. Ritenbaugh
The Offerings of Leviticus (Part Two): The Burnt Offering