Quran 21:6 · Al-Anbya

The messenger of truth always presents the truth on the strength of sound arguments. When the Prophet’s opponents felt that they could not counter his arguments with their own arguments, they tried to dissuade the people from treading the path of truth by levelling different types of false allegations, such as saying that this (the divine discourse in the Quran) was mere poetry, that it was literary magic, that these were the senseless ramblings of a madman, that it was all self-devised, etc. Since the Prophet Muhammad did not perform any miracles before the people of Makkah, they cast aspersions on his prophethood by raising the issue of why he had not brought any miracle from God, like the other prophets in the past. Throughout the history of religion, experience has shown that those who do not accept the truth on the presentation of sound arguments, refuse to accept it even after seeing a miracle. Therefore, it is essential for the well wishing of the people that admonition on the strength of arguments be continued, instead of concluding the process of preaching by performing a miracle, because the rejection of a miracle invites the wrath of God. Consequently, the next stage can only be the destruction of the deniers.