COMMENTARY on 68:39
A. Yusuf Ali:

Translation:
Or have you Covenants with Us to oath, 5620 reaching to the Day of Judgment, (providing) that you shall have whatever you shall demand?
Commentary:

5620  Nor can the Pagans plead that they have any special Covenants with Allah which give them a favoured position above other mortals. The "Chosen Race" idea of the Jews is also condemned. It is quite true that a certain race or group, on account of special aptitude may be chosen by Allah to uphold His truth and preach it. But this is conditional on their following Allah's Law. As soon as they become arrogant and selfish, they lose that position. They cannot have a perpetual and unconditional lease till the Day of Judgement.