Leave alone those who take their religion to be mere play and amusement, and are deceived by the life of this world. But proclaim (to them) this (truth): that every soul delivers itself to ruin by its own acts: it will find for itself no protector or intercessor except God: if it offered every ransom, (or reparation), none will be accepted: such is (the end of) those who deliver themselves to ruin by their own acts: they will have for drink (only) boiling water, and for punishment, one most grievous: for they persisted in rejecting God. (6:70)

"Such as took their religion to be mere amusement and play, and were deceived by the life of the world." That day shall We forget them as they forgot the meeting of this day of theirs, and as they were wont to reject Our signs. (7:51)

The life of this world is but play and amusement: and if ye believe and guard against Evil, He will grant you your recompense, and will not ask you (to give up) your possessions. (47:36)