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"And what is the matter with you that you spend not in the Cause of Allaah? And to Allaah belongs the heritage of the heavens and the earth, Not equal among you are those who spent and fought before the conquering (of Makkah) (with those among you who did so later), Such are higher in degree than those who spent and fought afterwards, But to all, Allaah has promised the best (reward), And Allaah is All-Aware of what you do." [Al-Hadeed (57):10]

Narrated 'Abdur Rahman bin Abi Bakra's father:

Once the Prophet was riding his camel and a man was holding its rein. The Prophet asked, "What is the day today?" We kept quiet, thinking that he might give that day another name. He said, "Isn't it the day of Nahr (slaughtering of the animals of sacrifice)" We replied, "Yes." He further asked, "Which month is this?" We again kept quiet, thinking that he might give it another name. Then he said, "Isn't it the month of Dhul-Hijja?" We replied, "Yes." He said, "Verily! Your blood, property and honor are sacred to one another (i.e. Muslims) like the sanctity of this day of yours, in this month of yours and in this city of yours. It is incumbent upon those who are present to inform those who are absent because those who are absent might comprehend (what I have said) better than the present audience." [The Book of Knowledge Volume 1, Book 3, Hadeeth 67]