The virtue of the Three Masajid Sahih Muslim 1397 b
Arabic hadith text
وَحَدَّثَنَاهُ أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا عَبْدُ الأَعْلَى، عَنْ مَعْمَرٍ، عَنِ الزُّهْرِيِّ، بِهَذَا الإِسْنَادِ غَيْرَ أَنَّهُ قَالَ " تُشَدُّ الرِّحَالُ إِلَى ثَلاَثَةِ مَسَاجِدَ
Translation
This hadith has been narrated on the authority of Zuhri (but with this change of words) that he (Allah's Apostle) said
" Undertake journey to three mosques."