Idioms
The language peculiar to a people or to a district, community, or class
Idiom:
swear on (something)
Meaning:
to use something as the reason or authority that what you are saying is the truth
Example:
The accused criminal was asked to swear on a religious text at the trial to make sure that he was telling the truth.
List of common idioms, their meanings and examples of their usage in sentences
An idiom is defined as - a group of words in a fixed order that has a particular meaning that is different from the meanings of each word on its own.