And if you cannot do it-and most certainly you cannot do it-then be conscious of the fire whose fuel is human beings and stones which awaits all who deny the truth!

But if ye cannot- and of a surety ye cannot- then fear the Fire whose fuel is men and stones,- which is prepared for those who reject Faith.

And if ye do it not - and ye can never do it - then guard yourselves against the Fire prepared for disbelievers, whose fuel is of men and stones.

But if you do (it) not -- and you can never do (it) -- then be on your guard against the fire whose fuel is men and stones; it is prepared for the disbelievers.

But if you do not - and you will never be able to - then fear the Fire, whose fuel is men and stones, prepared for the disbelievers.