The revelation says: ``And have faith in what I have sent down confirming that which is with you.''
That is to say that, you have received REVELATION before; and now has come a new revelation cofirming the previous one which is with you. Are you then, going to be the first one to reject it? If the pagan Arabs, reject my revelations, it is not so strange as your rejection by the people of the Book, as I have informed them in my scripture that, I will send a prophet of such that qualifications.
If the Jews were not so much stubbron and obstinate, they should have been among the first people to convert and to cofirm the Divine Mission of Mohammad.
Then the revelation continues saying: ``Sell not my signs for a little price.''
In His fourth commandment, Allah calls them to fear HIM alone; i.e. don't be afraid of your sustenance being barred, or some of the hard liners of the jews to raise their hands against you; only fear Me and obey ME.