Abu Sa 'id AI-Khudri (RAA) narrated that The Messenger of Allah (ﷺ) said:
"One should not undertake journeys except to three mosques: al-Masque al-Haram (in Makkah ), the Aqsa mosque, or this mosque (in Madinah)." Agreed upon.
English reference: Book 5, Hadith 727
Arabic reference: Book 5, Hadith 707