'Tax gatherer' in the Bible

After this, Jesus went out; and he noticed a tax-gatherer, named Levi, sitting in the tax-office, and said to him: "Follow me."

"Two men went up into the Temple Courts to pray. One was a Pharisee and the other a tax-gatherer.

The Pharisee stood forward and began praying to himself in this way--'O God, I thank thee that I am not like other men-- thieves, rogues, adulterers--or even like this tax-gatherer.

Meanwhile the tax-gatherer stood at a distance, not venturing even 'to raise his eyes to Heaven'; but he kept striking his breast and saying 'O God, have mercy on me, a sinner.'