It was narrated from ‘Aishah that the Prophet (ﷺ) used to pray nine Rak’ah at night
Hadith No. 1360
Sunan Ibn Majah
Gradings:
Al-Albani:
Sahih
Muhammad Fouad Abd al-Baqi:
Sahih
Shuaib Al Arnaut:
Sahih
Zubair Ali Zai:
Sahih