It wasnarrated from Abu Hurairah that the Messenger of Allah (ﷺ)said toa man:
"I advise you to fear Allah and to say the Takbir(AllahuAkbar) in every high place." (PT)
English reference (PT): Vol. 4, Book 24, Hadith 2771 (PT)
Arabic reference (PT): Book 24, Hadith 2876 (PT)