It was narrated from Ibn ‘Abbas (رضي الله عنه) that

The Prophet (ﷺ) said: "No deed is better than that done during these days," meaning the ten days (first ten days of Dhul-Hijjah), it was said: Not even jihad for the sake of Allah? He said: "Not even jihad for the sake of Allah, except for one who goes out with himself and his wealth and does not come back with either of them."