A father told his sons to live in peace with one another, but they did not listen.
So he asked them to bring him a broom and said:
“Break it.”
No matter how hard they tried, they could not break the whole broom.
Then the father untied the broom and told them to break the twigs one by one.
They broke the separate twigs easily.
Then the father said:
“So it is with you: if you live in agreement, no one will overcome you. But if you quarrel and each stands alone, anyone can harm you easily.”