The most famous and widely used legal and jurisprudential rules:

The contract is the law of the contracting parties.
There is no crime and no punishment except by text.
Possession of a movable property is a title dee
The right to litigation is guaranteed.
The original is a clearance.
No one is excused for his ignorance of the law.
Doubt is interpreted in favor of the accused.
The accused is innocent until proven guilty.
There is nothing different from writing except writing.
The stabber is not harmed by stabbing him.
What is known by convention is like a condition.
What is known among merchants, such as what is stipulated among them.
The plaintiff is not judged, but rather he is judged, or his claim is dismissed.
A claim is not met with a claim.
Declaration is the master of evidence.
The acknowledgment is an argument that is limited to the person making the statement and does not extend to anyone else.
The person is taken to task for his approval.
We will not speak after the decision has been made.
What is established with certainty cannot be removed by doubt.
The proof is upon the one who calls, and the oath is upon the one who denies.