1 Corinthians 10:26 - Ellicott's Commentary On The Whole Bible

The earth is the Lord’s.... — All food that earth brings forth or nourishes is God’s gift, and therefore good. It was merely when regarded as an actual sacrifice that any meat could be considered that “of devils.” This great truth, recognised in the Old Testament as well as in the New, is the reason of the previous statement that conscience need not come into the matter at all.