مُسْنَدُ أَحْمَدَ
Musnad Ahmad 3013
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) said: "Whoever claims to belong to someone other than his father, or to someone other than his masters, upon him be the curse of Allah, the angels and all the people.”
Musnad Ahmad 3037Its isnad is qawi]