Tafsir of As-Saffat 37:37

بل جاء بالحق

Nay! he has come with the truth, meaning, the Messenger of Allah has brought the truth with all that Allah has revealed to him of stories and commandments.

وصدق المرسلين

and he confirms the Messengers. means, he fulfills their prophecies of his praiseworthy characteristics and his perfect way, and he tells people of the Laws and commands of Allah, as they said he would

ما يقال لك إﻻ ما قد قيل للرسل من قبلك

Nothing is said to you except what was said to the Messengers before you. (41:43)