Sunan Abi Dawud 402
سنن أبي داود#402SahihAbu Hurairah reported the Messenger of Allah (ﷺ) as saying:When the heat is violent, offer (the Zuhr) prayer when it becomes fairly cool, for the violent heat comes from the bubbling over the Hell
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 (536) Sahih Muslim (615)
In-book reference: 2:12