Yunus 10:16

Say, “If Allah had willed, I would not have recited it to you, nor would He have made it known to you. I have spent a lifetime[20] among you before this. Do you not then understand?”

[20] i.e., forty years before receiving revelation.

Say, "If Allāh had willed, I would not have recited it to you, nor would He have made it known to you, for I had remained among you a lifetime before it.[516] Then will you not reason?"

[516] The Prophet (ﷺ) lived among his people forty years before receiving any revelation.

16. Say (O Muhammad صلى الله عليه وسلم): "If Allâh had so willed, I should not have recited it to you nor would He have made it known to you. Verily, I have stayed amongst you a life time before this. Have you then no sense?"

Say: If Allah had so willed I should not have recited it to you nor would He have made it known to you. I dwelt among you a whole lifetime before it (came to me). Have ye then no sense?