https://www.nature.com/articles/sc19677.pdf?origin=publicationstage ;)

Paraplegia
This form of paralysis affects the body below the waist, affecting legs, hips and functions including sexuality and the excretion. How people experience this kind of paralysis can differ from patient to patient, and although paraplegia generally denotes the loss of use and feeling below the waist, this can be changeable depending upon the individual.

It is uncommon for anybody to recover from this, although intensive physical therapy and functioning can help strengthen muscles and nerve connections. Paraplegic paralysis is most often caused by spinal cord injuries, and these affect the brain’s ability to send and receive signals from below the site of the injury.

Also, the Femoral Nerve (The nerve that causes inability to walk) is in the mid-thigh, running down to the foot. Your character was stabbed in the stomach and the back. Femoral neuropathy, or femoral nerve dysfunction, occurs when you can’t move or feel part of your leg because of damaged nerves, specifically the femoral nerve.