It is just like English sayings and phrases, there are Japanese sayings and phrases as well. It is called [kotowaza ことわざ].
What is the KOTOWAZA?
Kotowaza is the Japanese saying/phrases which expresses people’s wisdom and it has been told by many people from long time ago. And it is an example of something and a teachings of the life.
虻蜂とらず・ABU HACHI TORAZU (TORANAI)
The spider tried to catch a horsefly and a bee that were stuck at a spiderweb, ended up loosing the both.
Attempting two tasks at the same time, accomplishing neither. Trying to get two at the same time, losing both.
Fall between two stools／chase two hares and catch neither
How to use it
Yokubatte iruto abu hachi torazu ni owatte shimau zo
If you are too greedy, you’ll end up with nothing at all.
The opposite phrase
一石二鳥（いっせきにちょう/isseki ni chou). 一挙両得 （いっきょりょうとく/ikkyoryoto）ーKill two birds with one stone