Custom in this entry refers chiefly to a tax or tribute, especially the tax collected by Roman publicans on goods and transactions. Publicans maintained stations at city gates, highways, and designated places called the receipt of custom.
The Gospels mention the receipt of custom and the taxes collected by publicans. Publicans were disliked because they were tempted to exact more than the lawful amount. Scripture also mentions the annual half-shekel temple tribute and the money-changers who exchanged foreign coins for Jewish money.
Money-changers served pilgrims who needed Jewish coin for the temple tribute. Jesus drove them from the temple because the traffic was being conducted for gain contrary to the law.