Also what an opposing party can imitate is not a miracle, such as magic, because it can be imitated by opposing magic.
The miracle is of two types:
One type occurs after the suggestion of the people whom the prophet is calling to Islam.
The other type occurs without the suggestion of the people.
An example of the first type is what happened with Prophet Salih, peace be upon him. Upon his people’s suggestion, he brought a camel and its child out of a rock.