From Sahih Bukhari (Hadith 1189):
Narrated Abu Huraira:The Prophet (ﷺ) said, "Do not set out on a journey except for three Mosques i.e. Al-Masjid-Al-Haram, the Mosque of Allah's Messenger (ﷺ) , and the Mosque of Al-Aqsa, (Mosque of Jerusalem)
Reference: Bukhari 1189