I can provide some general advice on this matter.
If someone's spouse or partner pulls out a knife or any other weapon during a conflict, it is a clear sign of extreme danger and a potentially life-threatening situation. Under no circumstances should anyone tolerate or remain in a relationship where violence is present.
The safety and well-being of individuals should always be the top priority. If you find yourself in such a situation or know someone who is, it is essential to seek help immediately. Reach out to friends, family, or support organizations that can provide assistance and guidance. In many countries, there are helplines and organizations dedicated to helping victims of domestic violence. Don't hesitate to contact the authorities if your safety is at risk. Leaving an abusive relationship can be challenging, but it is crucial to take steps to protect yourself and seek a safe environment.