The religion introduced in the foregoing pages is called “Islam”, and the Almighty has asserted in the Qur’ān that no other religion is acceptable to Him:

إِنَّ الدِّينَ عِندَ اللّهِ الإِسْلاَمُ … وَمَن يَبْتَغِ غَيْرَ الإِسْلاَمِ دِينًا فَلَن يُقْبَلَ مِنْهُ وَهُوَ فِي الآخِرَةِ مِنَ الْخَاسِرِينَ (3 :19 ، 85)
The only true religion in God’s sight is Islam … and he that chooses a religion other than Islam, it will not be accepted from him and in the world to come he will surely be among the losers. (3:19, 85)

Just as the word “Islam” is used for the whole corpus of religion, it is also sometimes used to imply its outer form. As regards its outer form, it consists of the following five things:

1. Bearing witness that there is no god besides Allah and Muhammad (sws) is His Messenger.

2. Offering the prayer

3. Paying zakāh

4. Keeping fasts of Ramadān

5. Offering the hajj of the Baytullāh