Al-Baqarah 2:24

Fa-in lam tafAAaloo walan tafAAaloo fattaqooannara allatee waqooduha annasuwalhijaratu oAAiddat lilkafireen

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

But if you do not - and you will never be able to - then guard yourselves against the Fire, the fuel of which will be men and stones. It has been prepared for disbelievers.