مُسْنَدُ أَحْمَدَ
Musnad Ahmad 2915
Musnad of 'Abdullah bin al-'Abbas bin 'Abdul-Muttalib from the Prophet
It was narrated that Ibn 'Abbas (رضي الله عنه) said: The Prophet (ﷺ) used to pray in a garment, wrapping it around himself and using its extra length to protect himself from the heat and cold of the ground.
Musnad Ahmad 2938Hasan because of corroborating evidence; this is a da'eef is