The Council of Laodicea in about 363 AD said "No others shall sing in the Church, save only the canonical singers, who go up into the ambo and sing from a book." They also said "It is not permitted to hold love feasts, as they are called, in the Lord's Houses, or Churches, nor to eat and to spread couches in the house of God."

LOL. Ok. Sorry, they completely lost me at Canon 15.

So when they said, "Christians must not judaize by resting on the Sabbath...", I feel pretty safe in ignoring them.