Ramayana
अवश्यमेभिः सर्वैश्च गन्तव्यं यमसादनम् । तन्निगृह्णीष्व पौलस्त्य यमं परपुरञ्जय ॥ 7-20-16 ॥
"All these men must inevitably go to the abode of Yama; therefore subdue Yama himself, O scion of Pulastya, O conqueror of the cities of your foes!"
english translation