tatas ca gadayaratim
daksinasyam bhruvi prabhuh
ajaghne sa tu tam saumya
gadaya kovido ’hanat
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
Then with His mace the Lord struck the enemy on the right of his brow, but since the demon was expert in fighting, O gentle Vidura, he protected himself by a maneuver of his own mace.