The Reward for avoiding Sin

Allah says: `This is what We have commanded you to do in the rituals (of Hajj), and this is the great reward that the person who does that will gain.'

وَمَن يُعَظِّمْ حُرُمَـتِ اللَّهِ

ثُمَّ لْيَقْضُوا (Then, they must remove their dirt - 22:29) The word تَفَث means dirt, which gathers on human body. While a person is in the state of ihram, he cannot shave, trim or pluck his hair, nor can he pare his nails, nor use perfume, and it is quite natural that dirt should collect under his hair and nails and on his body. This verse requires of the pilgrims that after they have performed the sacrifice, they should remove this dirt, meaning thereby that they should now remove the ihram, (and wear their normal clothes) shave their heads and pare their nails. This verse mentions sacrifice first and then refers to the removal of the dirt, which suggests that these two acts must be performed in that order. It is forbidden to shave one's head or pare nails before the obligatory sacrifice. Anyone who does so must slaughter an animal as دَم dam (to atone for his sin).

Observance of the correct sequence in the performance of various acts related to Hajj