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विनश्यते विषये यस्य मृत्युर्मृत्योर्यथा विषयं प्राप्य मर्त्यः ॥ १६ ॥
In plain words
Enter his domain and Death itself dies — exactly the way a mortal dies once he enters the domain of Death.
Close to the Sanskrit
In whose domain Death is destroyed, just as a mortal, having reached the domain of Death, [is destroyed].