But the wicked are like the troubled sea, when it cannot rest, whose waters cast up mire and dirt. There is no peace, saith my God, to the wicked.(Isaiah 57:20-21)

Raging waves of the sea, foaming out their own shame; wandering stars, to whom is reserved the blackness of darkness for ever. (Jude 1:13)

The nations of the Earth will gather against the Muslims like hungry people going to sit at a table full of food. This will occur when the Muslims are large in number, but "like the foam of the sea". [Bukhari]

Abdullah bin Amr reported that the messenger of Allah said: "There will come a calamity which will wipe out the Arabs. Their slain will be in hell. The tongue will be more severe in this than the blow of the sword." (Tirmidhi, Ibn Majah)