[Ali Imran]

Surah Al-Ma'idah (5:68):
"Say, O People of the Book, you have no ground to stand on unless you uphold the Torah, the Gospel, and what has been revealed to you from your Lord."
(Acknowledges the scriptures given to Jews and Christians.)

Anyway, the Quran acknowledge what the jews and Christians have during Muhammad's time

The Torah came first. They must follow the injunctions therein. Then the Injeel (Gospel), they must follow the injunctions therein. And then the Quran, they must follow the injunctions therein.