Sunan Abi Dawud 3119
سنن أبي داود#3119SahihNarrated Umm Salamah:The Messenger of Allah (ﷺ) as saying: When one of you is afflicted with a calamity, he should say: "We belong to Allah, and to Him we do return." O Allah, I expect reward from Thee from this affliction, so give me reward for it, and give me a better compensation
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
Zubair Ali ZaiHasan
In-book reference: 21:31