Answer: This is a sign of sorrow. Garment means a screen, covering. This is a correction. However, if this correction turns out to be insufficient, incorrect, or bad, then it is as if it were torn apart.
Or, on the contrary, when a loved one dies, we rend our garments. This is a symbol that the force that was with us while he existed has disappeared somewhere.
From KabTV’s “Secrets of the Eternal Book” 9/27/21