the vegetation of a good land comes forth by the permission of its lord and that which is bad brings forth nothing but with difficulty. thus do we explain variously the ayat for a people who give thanks.
والبلد الطيب يخرج نباته بإذن ربه والذي خبث لا يخرج إلا نكدا كذلك نصرف الآيات لقوم يشكرون