Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) narrated: The Messenger of Allah (peace and blessings be upon him) was held back one night; he (peace and blessings be upon him) was with one of his family or his wives, and he did not come to us for the Isha prayer until a large part of the night had passed. Then he came to us while some of us were praying and some were lying down. He gave us glad tidings and said: "None of the People of the Book offers this prayer." Then this verse was revealed: "They are not all alike; among the People of the Book is a community standing (upright in religion), reciting the verses of Allah during the hours of the night and prostrating" [Surah Al Imran: 113].
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 10172