"Worship" in Islamic terminology has a vast meaning. It is called "Ibadah", which does not mean only to pray Namaz and chant the name of God, but worship in it complete sense mean to obey all the instructions of Allah which includes doing good things and abstaining from evil. For e.g. Quran says,

"Do not go even near to adultery". (Al-Qur' an, 17:32).

Thus if a person abstains from adultery he is worshipping Allah and he gets reward for it. Hence Pilgrimage, Fasting, Charity all these acts includes worship. One of the most important acts of worshiping is Namaz i.e."Salah" in Arabic. Allah and has prescribed five Namaz as compulsory for a Muslim men and women. (The women are excused during her menstruating period). Here are some benefits of Namaz.

"Recite what is sent of the Book by inspiration (Quran) and establish regular Namaz for, Namaz restrains from shameful and unjust deeds."
(Al-Qur' an, 29:45)

"Woe to the worshippers who are neglectful of their prayers. Those who (want but) to be seen (of men)."
(Al-Qur' an, 109:4,5)

O Ye who believe! Let not your wealth or your children divert you from the remembrance of Allah.
(Al-Qur' an, 63:9)

The five Salah i.e. Namaz is an expiation of sin through which Allah blots out (annuls) evil deeds. (Bukhari 1:506)

The person in Salah is speaking privately to his Lord.
(Bukhari 1:509)

Praying Salah in congregation is a reward equivalent to praying alone twenty five times. (Bulug-al-Maram)