UDL: The First 10 Days of Dhul Hijjah

Ibn Abbas reported: The Prophet, peace and blessings be upon him, said, “No good deeds are better than what is done in these first ten days of Dhul-Hijjah.” Some companions of the Prophet said, “Not even jihad in the way of Allah?” The Prophet said, “Not even jihad in the way of Allah, except for a man who goes out with his life and wealth at risk and he returns with nothing.”
Source: Ṣaḥīḥ al-Bukhārī 969