MINBAR منبر
The pulpit in a mosque from which the khutbah (or sermon) is recited. It consists of three steps and is sometimes a metal or wooden structure, and sometimes a mixture of brick or stone both against the wall. Muhammad in addressing the congregation stood on the uppermost

Burton says: “In the beginning the Prophet leaned, when fatigued, against a post, whilst preaching the khutbah or Friday sermon. The mimbar, or pulpit, was an invention of a Madinah man of the Banu Najjar. It was a wooden frame, two cubits long by one broad, with three steps, each one span high; on the topmost of these the Prophet sat when he required rest. The pulpit assumed its present form about A.H. 90, during the artistic reign of El Walid.”

Based on Hughes, Dictionary of Islam