The 1689LBCF | Chapter 30: Of the Lord's Supper - Paragraph 8
PARAGRAPH 8 All ignorant and ungodly persons, as they are unfit to enjoy communion with Christ, so are they unworthy of the Lord's table, and cannot, without great sin against Him, while they remain such, partake of these holy mysteries, or be admitted thereunto;12 yea, whosoever shall receive unworthily, are guilty of the body and blood of the Lord, eating and drinking judgment to themselves.13 12 2 Cor. 6:14–1513 1 Cor. 11:29; Matt. 7:6