Q: What is a sacrament?
A: A sacrament is an holy ordinance instituted by Christ; wherein, by sensible signs, Christ, and the benefits of the new covenant, are represented,1 sealed,2 and applied to believers.3

1 Peter 2:1. The like figure whereunto even baptism doth also now save us (not the putting away of the filth of the flesh, but the answer of a good conscience toward God,) by the resurrec tion of Jesus Christ.
Matthew 3:11. I indeed baptize you with water unto repentance: but he that cometh after me is mightier than I, whose shoes I am not worthy to bear: he shall baptize you with the Holy Ghost, and with fire.
Acts 8:13, 23. Then Simon himself believed also: and when he was baptized, he continued with Philip, and wondered, beholding the miracles and signs which were done. . . For I perceive that thou art in the gall of bitterness, and in the bond of iniquity.
1 Corinthians 3:6-7. I have planted, Apollos watered; but God gave the increase. So then neither is he that planteth any thing, neither he that watereth; but God that giveth the increase.
1 Corinthians 6:11. And such were some of you: but ye are washed, but ye are sanctified, but ye are justified in the name of the Lord Jesus, and by the Spirit of our God.
1 Corinthians 12:13. For by one Spirit are we all baptized into one body, whether we beJews or Gentiles, whether we be bond or free; and have been all made to drink into one Spirit.
Genesis 17:7,10. And I will establish my covenant between me and thee, and thy seed after thee, in their generations, for an everlasting covenant, to be a God unto thee, and to thy seed after thee. . . This is my covenant, which ye shall keep, between me and you, and thy seed after thee; every man-child among you shall be circumcised.
Exodus 12 throughout.
1 Corinthians 11:23, 26.


Westminster Project - See Thomas Vincent's Scriptural Catechism based on the WSC