مُسْنَدُ أَحْمَدَ
Musnad Ahmad 3925
Musnad of Abdullah bin Mas'ood
It was narrated from 'Abdullah bin Mas'ood from The Prophet (ﷺ) that he used to recite this supplication: “O Allah, I ask You for guidance, piety, abstinence (from that which is haram and is not appropriate) and independence of means.”
Musnad Ahmad 3950lts isnad is saheeh]