"Let no man therefore judge you in meat, or in drink, or in respect of an holyday, or of the new moon, or of the sabbath days:" (Col 2:16 KJV)
>> “Let no man therefore judge you in meat, or in drink, or in respect of an holyday, or of the new moon, or of the sabbath days:” <<
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The colossians were Hebrews of the dispersion, and were being persecuted severely by their pagan neighbors for keeping the feasts and the sabbaths.
Paul was encouraghing them to buck up.