The Messenger of Allah 3 said: There are no days greater in the sight of Allaah and in which righteous deeds are more beloved to Him than these ten days of Dhul-Hijjah, so during this time recite a great deal of TAKBIR -ALLAHU AKBAR TAHLIL -LA ILAAHA ILL-ALLAAH TAHMID ALLHAMDULILLAH (Reported by Ahmad, 7/224)