[And those who disbelieved - their deeds are like a mirage in a lowland] (Qur'an 24:39). Mujahid said: It is the level, barren ground.
﴿وَالَّذِينَ كَفَرُوا أَعْمَالُهُمْ كَسَرَابٍ بِقِيعَةٍ﴾ قَالَ مُجَاهِدٌ: وَهُوَ الْقَاعُ الْقَرْقَرَةُ