Complex sentence: The earliest recorded regular practice was to eat at home before the Lord's Supper if one was hungry (I Corinthians 11:34); however, the next known ancient practice was to fast from midnight until Mass that day.
Split into simpler sentences: The earliest recorded regular practice was to eat at home before the Lord's Supper if one was hungry (I Corinthians 11:34). The next known ancient practice was to fast from midnight until Mass that day.