SAHIH BUKHARI, BOOK 21 Prayer at Night (Tahajjud)
Volume 2, Book 21, Number 281:
Narrated Quza'a:
I heard Abu Said saying four words. He said, "I heard the Prophet (saying the following narrative)." He had participated in twelve holy battles with the Prophet.
Narrated Abu Huraira: The Prophet said, "Do not set out on a journey except for three Mosques i.e. Al-Masjid-AI-Haram, the Mosque of Allah's Apostle , and the Mosque of Al-Aqsa, (Mosque of Jerusalem)."
