It is narrated from Sayyiduna Wathilah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "In place of the Torah I was given the Seven Long (Surahs) (al-Sab' al-Tiwal); in place of the Zabur I was given the Mathani; and I was granted superiority through the Mufassal (Surahs)."
Hadith Referenceالمعجم الكبير للطبراني / باب الواو / 18406