Sunan Abi Dawud 1457
سنن أبي داود#1457SahihAbu Hurairah reported the Messenger of Allah (ﷺ) as saying:All praise be to Allah, the Lord of the Universe" (1) is the epitome or basis of the Qur'an, the epitome or basis of the Book, and the seven oft-repeated verses
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniSahih
Muhammad Muhyi Al-Din Abdul HamidSahih
Shuaib Al ArnautSahih
Zubair Ali ZaiSahih Bukhari (4704)
In-book reference: 8:42