Many verses in the Qur'an make clear that the Injil is given to Jesus who was born several hundred years [about 1,400] after Moses.
But in Sura 7:155-157 is the problem that Moses prays to Allah and in Allah's response to Moses we read
Those who follow the Messenger, the unlettered Prophet,
whom they find mentioned in their own (Scriptures), -
in the Taurat and the Gospel - .... -- Sura 7:157
The obvious problem is that the Gospel has not been revealed yet at that time, and nobody was able to find anything in it a nonexisting gospel.
A Muslim's Response by Randy Desmond
Date: Fri, 18 Oct 1996 14:02:51 PDT
We should realize that this is God telling Moses(pbuh) that Muhammad(pbuh) will be found in the Tawrah (Torah) and Injil (Gospel). If the past tense seems confusing, it shouldn't. Arabic and Hebrew both used past tense when prophecies were mentioned.
But it isn't speaking in past tense but in present tense ("whom they find mentioned). More details on this issue and a discussion of the verse in its context.
Contradictions in the Qur'an
Answering Islam Home Page