"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 اللَّهِ أَيُّ مَسْجِدٍ وُضِعَ أَوَّلُ؟ فَقَالَ «الْمَسْجِدُ الْحَرَامُ ثُمَّ الْمَسْجِدُ الْأَقْصَى» قَالَ قُلْتُ كَمْ كَانَ بَيْنَهُمَا؟ قَالَ «كَانَ بَيْنَهُمَا أَرْبَعُونَ سَنَةً وَحَيْثُ مَا أَدْرَكَتْكَ الصَّلَاةُ فَصَلِّ فَثَمَّ مَسْجِدٌ»