Sunan Abi Dawud 594
سنن أبي داود#594Da'ifAbu Hurairah reported the Messenger of Allah(ﷺ) as saying:The obligatory prayer is essential behind every Muslim, pious or impious, even if he has committed a sins
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniDaif
Muhammad Muhyi Al-Din Abdul HamidDaif
Zubair Ali ZaiDaif
In-book reference: 2:204