Explanation

The first Msjid (Mosque) on the surface of Earth is Masjid-ul-Haram. According to Sahih Bukhari Hadees Number 3425 – Chapter 60 – Chapter Belief Faith: Narrated Abu Dhaar: I said, “O Allah’s Messenger (ﷺ)! Which mosque was built first? ” He replied, “ Al-Masjid-ul-Haram .” I asked, “Which (was built) next?” He replied, “Al-Masjid-ul-Aqs-a (i.e. Jerusalem).” I asked, “What was the period in between them?” He replied, “Forty (years).” He then added, “Wherever the time for the prayer comes upon you, perform the prayer, for all the earth is a place of worshipping for you.” References: sunnah.com , hamariweb.com , urdupoint .