"If you wait on side of mountian with mouth open, eventually roast duck fly in"

"If you walk around with your mouth open eventually a meat pie will fall in"

"Rabbit, tree, snack"

These are actually Chinese proverbs about patience and free food. The first one, I am told, is probably made up by some Westerner whereas the second is authentic (roast duck is western but meat pies are Chinese?) The third one is a nifty three character way of saying "If you wait behind a tree eventually a rabbit will run into it and you'll get a free snack".

The Japanese version emphasises the patience aspect and not so much the free food:

"you have to wait for 3 years of continual rain on a stone before a hole forms"

My advice is to hide behind a tree with your mouth open. This gives you three opportunities for free food. Not sure why you need a hole in a stone.