Allah has favored over other days, the first ten days of Dhul Hijjah are a great season of worship with great virtues and unmatched blessings.
Prophet Muhammad (peace be upon him) said:
“There are no days in which righteous deeds are more beloved to Allah than these ten days.” The people asked, “Not even jihad for the sake of Allah?” He said, “Not even jihad for the sake of Allah, except in the case of a man who went out to fight giving himself and his wealth up for the cause, and came back with nothing.” (Al-Bukhari).
Sheikh Asim Al-Hakim talks about these days and their virtues here…