Al-Hijr Verse 50

and that My torment is indeed the most painful.

and that My punishment is the most painful punishment.

and that My chastisement is the painful chastisement.

but My torment is the truly painful one.

And verily My torment! that is the torment afflictive

And that My Penalty will be indeed the most grievous Penalty.

At the same time, My chastisement is highly painful.

But My punishment is surely a painful one.

And that indeed the punishment of Mine is a painful punishment.

and that My punishment is a painful punishment.

And that My punishment – it is indeed the painful punishment.

And (also tell them) that My punishment is a very grievous one.

And that My torture, it is the torture, the painful.

And that indeed the punishment of Mine is a painful punishment.

And that My doom is a grievous doom.

And that My Torment is indeed the most painful torment.

Inform My servants that I am the Forgiving, the Merciful,

And that My punishment-- that is the painful punishment.

And that My doom is the dolorous doom.

and that My punishment is a painful one.

and that My punishment is the painful chastisement.

And that My torment is indeed the most painful torment.

and that My punishment is a painful punishment.

And that My punishment is the painful punishment.

and that My chastisement, of those who are disobedient, is the painful chastisement.

Declare to My servants, that I am truly the Oft-Forgiving, the Most Merciful. And that My torment is indeed the most painful torment.

meaning, `O Muhammad, tell My servants that I am the source of mercy and I am the source of punishment.'

Similar Ayat to this have already been quoted above, which indicate that we must always be in a state between hope (for Allah's mercy) and fear (of His punishment)