Are not five sparrows sold for two farthings, and not one of them is forgotten before God? Are not five sparrows sold for two farthings? - See this explained on Matthew 10:29 (note), from which place we learn that two sparrows were sold for one farthing, and here; that five were sold for two farthings: thus we find a certain proportion - for one farthing you could get but two, while for two farthings you could get five.
Related Commentaries of Luke 12:6
Luke 12:6
6 Are not five sparrows sold for two farthings, and not one of them is forgotten before God?