"I used to recite Qur'an to my father on the road, and if I recited a verse in which prostration was required, he would prostrate. I said: 'O my father, do you prostrate on the street?' He said: 'I heard Abu Dharr say: "I asked the Messenger of Allah (ﷺ): 'Which Masjid was built first?' He said: 'Al-Masjid Al-Haram.'  I said: 'Then which?' He said: 'Al-Masjid Al-Aqsa.'  I said: 'How long was there between them?' He said: 'Forty years. And the earth is a Masjid (or a place of prostration) for you, so wherever you are when the time for prayer comes, pray.'"  In Makkah.  "Furthest Masjid", meaning the Masjid in Jerulsalem.