Why did Saudi Arabia not sign the Declaration of Human Rights?

Saudi Arabia abstained from signing the Universal Declaration of Human Rights its call for freedom of religion violated the precepts of Islam, and that the human rights guaranteed by the Islamic-based law of Saudi Arabia surpassed those secured by the Universal Declaration.

This is used as the argument by the Saudi Arabia government in order to refuse to sign most other human rights documents. 

Further Reading:

• Universal Declaration of Human Rights
• Human Rights Day