When a person is buying an article without seeing it it is said, "don't buy a pig in a sack." When a thing is taken through a persons carelessness it is said, "it's no use closing the stable when the horse is gone."
Other old sayings are,
" A rolling stone gathers no moss." "April and May keep away from the say (sea), June and July swim till you die." "A wet May brings a haggard full of hay." "Practice makes perfect." "Wilful waste makes woeful want."
Newtown, The WardCo. Dublin