रक्षसाम् demons, बले in the army, निहते when it was killed, जनस्थाने in Janasthana, हतस्थाने spot of death, रक्षः O demon, अशक्तेन having no capacity, त्वया by you, एतत् this, असाधु dishonest, कृतं वै act is done.

"When the army of demons as killed you had no capacity to protect and was destroyed at Janasthana, the place of death. You acted in this dishonest way.