And the mountains are removed and will be [but] a mirage.
Tafseer
{ وسيِّرت الجبال } ذهب بها عن أماكنها { فكانت سرابا } هباء، أي مثله في خفة سيرها.
{And the mountains will be moved} They will be removed from their places {and will become a mirage} like nothing, that is, like it in the lightness of its movement.