Whats so special about first 10 days of Dul-Hajj?

Briefly :

please Visit this link :

http://www.sunnahonline.com/library/hajj/0010.htm

Those who are not doing haji, should fast. Each day is like fasting for the whole year. You should aim to fast at least one of the days before Eid. We cannot fast on the day of Eid.

Can somebody put up hadith and ayahs.

Virtues of the Ten Days of Dhul Hijjah :

How do the first ten days of the Month of Dhul Hijjah differ from other days of the year?

Ibn ‘Abbaas (may Allaah be pleased with him and his father) also reported that the Prophet (peace and blessings of Allaah be upon him) said: "There is no deed more precious in the sight of Allaah, nor greater in reward, than a good deed done during the ten days of Sacrifice." He was asked, "Not even jihaad for the sake of Allaah?" He said, "Not even jihaad for the sake of Allaah, 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." (Reported by al-Daarimi, 1/357; its isnaad is hasan as stated in al-Irwaa’, 3/398).

And it was narrated from Hunaydah ibn Khaalid from his wife that one of the wives of the Prophet (peace and blessings of Allaah be upon him) said: “The Messenger of Allaah (peace and blessings of Allaah be upon him) used to fast nine days of Dhu’l-Hijjah and the day of ‘Ashoora’ and three days of each month – the first Monday and two Thursdays.” Narrated by Imam Ahmad, 21829; Abu Dawood, 2437; classed as da’eef in Nasab al-Raayah, 2/180, but classed as saheeh by al-Albaani.