Go fish

Mat 17:24 And when they were come to Capernaum, they that received tribute money came to Peter, and said, Doth not your master pay tribute?
Mat 17:25 He saith, Yes. And when he was come into the house, Jesus prevented him, saying, What thinkest thou, Simon? of whom do the kings of the earth take custom or tribute? of their own children, or of strangers?
Mat 17:26 Peter saith unto him, Of strangers. Jesus saith unto him, Then are the children free.
Mat 17:27 Notwithstanding, lest we should offend them, go thou to the sea, and cast an hook, and take up the fish that first cometh up; and when thou hast opened his mouth, thou shalt find a piece of money: that take, and give unto them for me and thee.

This was a tax imposed for the use and maintenance of the temple. The temple was to worship God, Jesus being the Son of God was exempt from paying, but so as not to cause offense he had Peter cast a hook and pull in a fish with a coin in it's mouth. Peter had to obey to receive. The coin was the same amount as a shekel, which paid the tax for both Peter and the Lord. The miracle showed that Jesus was indeed Lord who kept the laws, even some ordinances that were not in the law. The law was for a certain time and continued as a custom.

Exo 30:10 And Aaron shall make an atonement upon the horns of it once in a year with the blood of the sin offering of atonements: once in the year shall he make atonement upon it throughout your generations: it is most holy unto the LORD.
Exo 30:11 And the LORD spake unto Moses, saying,
Exo 30:12 When thou takest the sum of the children of Israel after their number, then shall they give every man a ransom for his soul unto the LORD, when thou numberest them; that there be no plague among them, when thou numberest them.
Exo 30:13 This they shall give, every one that passeth among them that are numbered, half a shekel after the shekel of the sanctuary: (a shekel is twenty gerahs:) an half shekel shall be the offering of the LORD.

Jesus became our sin offering and our redeemer. He paid the price.

Eph 2:10 For we are his workmanship, created in Christ Jesus unto good works, which God hath before ordained that we should walk in them.
Eph 2:11 Wherefore remember, that ye being in time past Gentiles in the flesh, who are called Uncircumcision by that which is called the Circumcision in the flesh made by hands;
Eph 2:12 That at that time ye were without Christ, being aliens from the commonwealth of Israel, and strangers from the covenants of promise, having no hope, and without God in the world:
Eph 2:13 But now in Christ Jesus ye who sometimes were far off are made nigh by the blood of Christ.
Eph 2:14 For he is our peace, who hath made both one, and hath broken down the middle wall of partition between us;
Eph 2:15 Having abolished in his flesh the enmity, even the law of commandments contained in ordinances; for to make in himself of twain one new man, so making peace;
Eph 2:16 And that he might reconcile both unto God in one body by the cross, having slain the enmity thereby: