Signs of Prophethood.
The messengers and prophets who were sent by Allah to mankind must be given proofs and evidences to make the sincerity of their claims clear, something which confirms they are Allah’s messengers. This is the case to prevent people from having any argument against them, and having any excuse for disbelieving and disobeying them. Allah says: }Indeed We have sent Our Messengers with clear proofs{(Al-Hadîd :25)
The proofs that confirm the truthfulness of the messengers are many, of which the most important are:
1-Miracles
2-Glad tidings of the coming of the prophets and messengers
3-Considering their conditions
4-The fundamentals are the same
5-Allah granted them victory and His support