مُسْنَدُ أَحْمَدَ
Musnad Ahmad 3023
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) passed by a dead sheep that had been thrown away by its owners. He said: "By the One in Whose hand is my soul, this world is more insignificant to Allah than this is to its owners.”
Musnad Ahmad 3047Saheeh because of corroborating evidence]