Abd al-Rahman bin Yazid narrates: Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) led us in the Isha prayer and began the recitation with Surah al-Anfal, until, when he reached "He is the best Protector and the best Helper" [Surah al-Anfal: 40], he bowed; then he stood up and recited a surah in the second rak'ah.
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 9278