'Aishah (May Allah be pleased with her) reported:
Whenever the Messenger of Allah (ﷺ) stood for Salat at night, he would start his prayer with two brief Rak'ah.[Muslim]. (RU)
App reference (RU): Book 9, Hadith 190 (RU)
Arabic/English book reference (RU): Book 9, Hadith 1180 (RU)