Mount Dhubab

Mount Dhubab (also known as Mount Ra'yah) is where a famous miracle took place during the digging of the trench. The Prophet (s.a.w.) struck a large rock which was reduced to pieces and emitted a light. Upon this the Prophet (s.a.w.) gave the Muslims the glad tidings of the coming victories over Syria, Persia and Yemen.

(more to follow)

References:
History of Madinah Munawwarah – Dr. Muhammad Ilyas Abdul Ghani
When the Moon Split - Shaikh Safiur-Rahman Mubarakpuri