The Heights - 7:188 "Say: "I can neither benefit nor harm myself except what Allah wills. Had I known the secret, I would have increased my wealth and no evil would have touched me. I am but a bearer of glad tidings and a warner to a people who believe."
related verse:
Prophet Hud/11:31 I do not say that the treasures of Allah are with me, nor do I know the secret, nor do I claim to be an angel, nor do I say that Allah will not grant any favor to those whom your eyes despise. Allah knows better their secret thoughts. Otherwise I would be of the wrongdoers.

The Cattle/6:50 "Say: "I do not tell you that the treasures of Allah are with me. Nor do I know the secrets. Nor do I tell you that I am an angel. I only follow what has been revealed to me."Say also: "Are the blind and the seeing alike?"Do you not think?"

The Heights/7:188 "Say: "I can neither benefit nor harm myself except what Allah wills. Had I known the secret, I would have increased my wealth and no evil would have touched me. I am but a bearer of glad tidings and a warner to a people who believe."