مُسْنَدُ أَحْمَدَ
Musnad Ahmad 3601
Musnad of Abdullah bin Mas'ood
It was narrated that ‘Abdullah (رضي الله عنه) said: The Messenger of Allah (ﷺ) said something and I may add something else. The Messenger of Allah (ﷺ) said: "Whoever dies not associating anything with Allah will enter Paradise.” And I say: whoever dies associating anything with Allah will enter Hell.
Musnad Ahmad 3625Its men are thiqat]