A brief enjoyment [may be theirs in this world] -but grievous suffering awaits them [in the life to come]!

(In such falsehood) is but a paltry profit; but they will have a most grievous Penalty.

A brief enjoyment (will be theirs); and theirs a painful doom.

A little enjoyment -- and for them is a painful chastisement.

[It is but] a brief enjoyment, and they will have a painful punishment.