In reply to:
Where in the Bible does the 4th commandment change from Saturday to Sunday ?

See Jonathan Edwards' apologetic for: The Perpetuity and Change of the Sabbath; it's the first item listed, in 3 parts.

See also: The Foundations of the Sabbath in the Word of God by B.B. Warfield.

In His Grace,

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simul iustus et peccator

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