Dr. Saleh As-Saleh shows rulings of vow in Islam through some texts from book “Beneficial Saying for Explanation of Book of At-Tawhid” authored by Sh. M. ibn Abdul-Wahhab. He shows the definition of vow in Islam and explains that it is an act of shirk (disbelief) to make vow to other than Allah. He illustrates the issues that a person can make a vow regarding it.