مُسْنَدُ أَحْمَدَ
Musnad Ahmad 3548
Musnad of Abdullah bin Mas'ood
It was narrated from ‘Abdullah (رضي الله عنه) from The Prophet (ﷺ): "The Hour will not begin until a man from my family whose name is the same as mine becomes in charge (of the Muslims)."
Musnad Ahmad 3571lts isnad is hasan]