(Till, when the messengers despaired) they despaired in the belief of their people (and thought) and knew and were certain, i.e. the messengers (that they) their people (were denied) the promise of the messengers; it is also said that this means: the people denied that which the messengers brought to them from Allah, (then came unto them Our help) i.e. Our chastisement, destroying their people, (and whom We would was saved) i.e. the messengers and those who believed in them. (And our wrath) chastisement (cannot be warded from the guilty) from the idolaters.