How is the Sabbath to be sanctified?

Answer

The Sabbath is to be sanctified by a holy resting all that day, even from such worldly employments and recreations as are lawful on other days (), and spending the whole time in the public and private exercises of God's worship (; ), except so much as is taken up in the works of necessity and mercy ().

Read the 4 proof texts (KJV)

Leviticus 23:3: Six days shall work be done: but the seventh day [is] the sabbath of rest, an holy convocation; ye shall do no work [therein]: it [is] the sabbath of the LORD in all your dwellings.
Psalm 92:1-2: ¹[It is a] good [thing] to give thanks unto the LORD, and to sing praises unto thy name, O most High: ²To shew forth thy lovingkindness in the morning, and thy faithfulness every night,
Isaiah 58:13-14: ¹³If thou turn away thy foot from the sabbath, [from] doing thy pleasure on my holy day; and call the sabbath a delight, the holy of the LORD, honourable; and shalt honour him, not doing thine own ways, nor finding thine own pleasure, nor speaking [thine own] words: ¹⁴Then shalt thou delight thyself in the LORD; and I will cause thee to ride upon the high places of the earth, and feed thee with the heritage of Jacob thy father: for the mouth of the LORD hath spoken [it].
Matthew 12:11-12: ¹¹And he said unto them, What man shall there be among you, that shall have one sheep, and if it fall into a pit on the sabbath day, will he not lay hold on it, and lift [it] out? ¹²How much then is a man better than a sheep? Wherefore it is lawful to do well on the sabbath days.