Vol 2, Book 15. The Two Festivals (Eids). Hadith 086.

Narrated By Ibn Abbas : The Prophet said:

"No good deeds done on other days are superior to those done on these (first ten days of Dhul Hijja)." Then some companions of the Prophet said, "Not even Jihad?" He replied, "Not even Jihad, except that of a man who does it by putting himself and his property in danger (for God's sake) and does not return with any of those things."