It was narrated from Abu Musa in a Marfu' [1] report:
"Wait until it cools down to pray Zuhr, for the heat you experience is a breeze from Hell."[1] Meaning he attributed it to the Prophet (ﷺ). (DE)
English reference (DE): Vol. 1, Book 6, Hadith 502 (DE)
Arabic reference (DE): Book 6, Hadith 505 (DE)