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]. (ID)
Reference (ID): Bulugh al-Maram 1395 (ID)
In-book reference (ID): Book 13, Hadith 22 (ID)
English translation (ID): Book 13, Hadith 1395 (ID)