Possible Clues:

• It's very familiar
• 'A penny saved is a penny earned,' e.g.
• 'He who hesitates is lost,' e.g.
• "Too many cooks ...," e.g.
• "A stitch in time ...," e.g
• "A picture is worth ...," e.g
• Chestnut, say
• Bit from 'Poor Richard's Almanack'
• "Time is money" is one
• Long-used maxim