Sunan Ibn Majah, Hadith 2771 ⓘ
It was narrated from Abu Hurairah that the Messenger of Allah said to a man: “I advise you to fear Allah and to say the Takbir (Allahu Akbar) in every high place.”
حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا وَكِيعٌ، عَنْ أُسَامَةَ بْنِ زَيْدٍ، عَنْ سَعِيدٍ الْمَقْبُرِيِّ، عَنْ أَبِي هُرَيْرَةَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ لِرَجُلٍ " أُوصِيكَ بِتَقْوَى اللَّهِ وَالتَّكْبِيرِ عَلَى كُلِّ شَرَفٍ " .
also referenced under: Book 24, Hadith 2876 (In-Book) & Volume 4, Book 24, Hadith 2771 (DarusSalam)