Narrated Abu Sa'id al-Khudri (RA):
The Prophet (ﷺ) said: "No (religious) journey is to be undertaken except to (pray in) the three mosques: The Sacred Mosque (Makkah), the Aqsa Mosque (Jerusalem), and this Mosque of mine (al-Madinah)."[Agreed upon, and the wording is al-Bukhari's].
Reference: Bulugh al-Maram 1395
In-book reference: Book 13, Hadith 22
English translation: Book 13, Hadith 1395