"I said: 'O Messenger of Allah! Which mosque was built first?' He said: 'Al-Masjid Al-Haram (in Makkah).' I said: 'Then which?' He said: 'then Al-Masjid Al-Aqsa (in Jerusalem).' I said: 'How many years between them?' He said: 'Forty years, but the whole earth is a mosque for you, so pray wherever you are when the time for prayer comes.'" (Using translation from Ibn Mājah 753)
قُلْتُ يَا رَسُولَ اللهِ أَيُّ مَسْجِدٍ وُضِعَ أَوَّلُ؟قَالَ الْمَسْجِدُ الْحَرَامُ قَالَ قُلْتُ ثُمَّ أَيٌّ؟ قَالَ ثُمَّ الْمَسْجِدُ الْأَقْصَى قَالَ قُلْتُ كَمْ بَيْنَهُمَا؟ قَالَ أَرْبَعُونَ سَنَةً ثُمَّ أَيْنَمَا أَدْرَكَتْكَ الصَّلَاةُ فَصَلِّ فَهُوَ مَسْجِدٌ