Quran 26:204 · Ash-Shu'ara

When, on behalf of God, the call for Truth appears at the level of a prophet, it appears in its final and perfect shape. That is why it becomes necessary for God’s punishment to visit any community which denies the prophet. However, until this punishment is actually administered, man considers himself safe from it. In order to prove the divine call baseless, he adopts various tactics. Sometimes he derides the prophet’s personality and sometimes he calls the Divine revelation brought by him spurious. Sometimes he says that if God is against them, why does He not punish them? The only responsibility of the prophet, or the preacher acting on behalf of the prophet, is that he should make the people aware of the Truth. All matters over and above that are the responsibility of God and He shows them this when He wills.