مُسْنَدُ أَحْمَدَ
Musnad Ahmad 3340
Musnad of 'Abdullah bin al-'Abbas bin 'Abdul-Muttalib from the Prophet
It was narrated that Ibn 'Abbas (رضي الله عنه) said: The Messenger of Allah (ﷺ) offered the fear prayer in Dhu Qarad with one row behind him and one row facing the enemy. He led them in praying one rak'ah, then (that row) said the salam, The Prophet (ﷺ) prayed two rak’ahs and each group prayed one.
Musnad Ahmad 3364Its isnad is saheeh]