Bede the Venerable — as excerpted in the Catena Aurea on Mark 2:13-17

“(i. 11. in Marc.) So also the same person is called Levi and Matthew; but Luke and Mark, on account of their reverence and the honour of the Evangelist, are unwilling to put the common name, while Matthew is a just accuser of himself, (Prov. 18. Vulg.) and calls himself Matthew and publican. He wishes to shew to his hearers that no one who is converted should despair of his salvation, since he himself was suddenly changed from a publican into an Apostle. But he says that he was sitting at the ‘teloneum,’ that is, the place where the customs are looked after and administered. For ‘telos’ in Greek is the same as ‘vectigal,’ customs, in Latin.”