تکبیر هنگام گذر از حجرالاسود

Say Takbeer every time you pass the Black Stone. The Prophet (SAW) performed At-Tawaaf riding a camel. Every time he passed the corner (containing the Black Stone), he would point to it with something that he was holding and say Allahu Akbar.

منبع: صحیح بخاری، حدیث 1613