مُسْنَدُ أَحْمَدَ
Musnad Ahmad 2018
Musnad of 'Abdullah bin al-'Abbas bin 'Abdul-Muttalib from the Prophet
It was narrated that Abu Jamrah said: I heard Ibn "Abbas say: The Prophet (ﷺ) prayed thirteen rak"ahs at night.
Musnad Ahmad 2019Sahih (Darussalam) [ al Bukhari (1138) and Muslim(764)]