مُسْنَدُ أَحْمَدَ
Musnad Ahmad 4235
Musnad of Abdullah bin Mas'ood
It was narrated "Abdullah bin Mas'ood said: The Messenger of Allah (ﷺ) said: “Beware of these two marked cubes that are thrown (i.e. dice), for they are the gambling of the non-Arabs.”
Musnad Ahmad 4263Saheeh and its isnad is da'eef]