Definition: CSSI is a term in the Bible used to describe an action taken by a man who was jealous and had a heart disease, which led him to murder his wife and children. The biblical passage that references this particular act includes Deuteronomy 21:3-5 (ESV): "Then Moses said to Aaron, 'You will not touch the calf of the house of Israel until you see the man who is so jealous as your father has been.'" The term "cssi" refers to a specific type of jealousy that can lead to violent actions like murder. This act was particularly heinous because it resulted in severe punishment for the perpetrator and further harmed the victims, including their children.