مُسْنَدُ أَحْمَدَ
Musnad Ahmad 1995
Musnad of 'Abdullah bin al-'Abbas bin 'Abdul-Muttalib from the Prophet
It was narrated that Moosa bin Salamah said: I said to Ibn "Abbas: If you do not catch up with the prayer in the mosque, how many (rak"ahs) do you pray in al Batha"? He said: Two rak’ahs, That is the way of the Prophet (ﷺ) .
Musnad Ahmad 1996Sahih (Darussalam) [, Muslim (688)]