مُسْنَدُ أَحْمَدَ
Musnad Ahmad 3646
Musnad of Abdullah bin Mas'ood
It was narrated that ‘Abdullah (رضي الله عنه) said: The Messenger of Allah (ﷺ) said: “Follow one Hajj and ‘Umrah with another, it will erase poverty and sin as the bellows eliminates the dross of iron and gold and silver. And an accepted Hajj brings no less a reward than Paradise.”
Musnad Ahmad 3669Saheeh because of corroborating evidence; this is a hasan is