Arabic is used as the official language of Saudi Arabia pilgrimage period due to the arrival of Muslims in the commercial activities come alive.
Saudi Arabia is a country with oil, oil products and natural gas resources.
Some of the Arabic countries have very rich underground resources, processing them and exporting them to many other countries.
Tourism
Tourism is one of the most important sources of income in the country. 1.5 million people per year come to Mecca and Medina in order to perform Hajj pilgrimage.