Matthew 17:27
27 But we do not want to make these men who take the tax angry. So go to the lake and throw out a line to catch fish. Pull up the first fish that you catch on your line. Open the mouth of the fish and you will find a coin inside it. Take the coin and give it to those who receive taxes for the temple. This will be enough money for both my tax and yours.’
17:26Jesus is telling Peter that he and the other disciples belong to God's family. So they did not need to pay tax for the temple.