when and where did Muhammad first receive words from Allah
The answer to your question is Muhammad (S.A.W) was first visited by the archangel Gabriel who revealed to him the first few words of the Holy Qur'an in a cave called Hira of the mountain Jabal an Nour in 610 AD.
Answer:
Muhammad first received revelations in 609 CE in a cave on Mount Hira, near Mecca.