(Say) O Muhammad: (O People of the Scripture!) i.e. the Jews and Christians. (You have naught) of the religion of Allah (till ye observe the Torah and the Gospel) until you truly believe in what is in the Torah and the Gospel (and that which was revealed unto thee (Muhammad) from your Lord) in all Scriptures given to all messengers. (That which is revealed unto you (Muhammad) from your Lord) the Qur'an (is certain to increase the contumacy) constancy in disbelief (and disbelief) and firmness in disbelief (of many of them) of their disbelievers. (But grieve not for the disbelieving folk) do not be saddened for their destruction in their state of disbelief, if they do not believe.