守株缘木

[abbreviation of two idioms:“wait for gains as one who stands by a tree stump waiting for more hares to come and dash themselves” and “do the impossible as one who climbs a tree to catch fish”] “守株待兔”、“缘木求鱼”的略语,比喻不根据实际情况而去做根本不可能做到的事

乃区区循大道以求之,不几于守株椽木乎?——马中锡《中山狼传》