Sahih Muslim | Book 7 | Hadith Number 3220

Narrated by Abu Haraira (Allah be pleased with him)
Abu Haraira (Allah be pleased with him) reported Allah's Messenger (way peace be upon him) as saying: One should undertake journey to three mosques: the mosque of the Ka'ba, my mosque, and the mosque of Elia (Bait al-Maqdis).