مُسْنَدُ أَحْمَدَ
Musnad Ahmad 1994
Musnad of 'Abdullah bin al-'Abbas bin 'Abdul-Muttalib from the Prophet
It was narrated that Ibn "Abbas said: We travelled with the Messenger of Allah (ﷺ) between Makkah and Madinah, and he prayed two rak"ahs, not fearing anyone but Allah.
Musnad Ahmad 1995Sahih hadeeth; its isnad is da'eef]