Sahih Bukhari Volume 004, Book 052, Hadith Number 295.
Hadith Section/Book: Sahih Bukhari Sahih Bukhari Book 52. Fighting for the Cause of Allah (Jihaad)
Narated By Ibn 'Abbas : A man came to the Prophet and said, "O Allah's Apostle! I have enlisted in the army for such-and-such Ghazwa, and my wife is leaving for Hajj." Allah's Apostle said, "Go back and perform Hajj with your wife."