Ramayana
स विहाय त्विमं लोकं प्रविष्टो वरुणालयम् । शूलं निवेश्य लवणे वरं तस्मै न्यवेदयत् ॥ 7-61-20 ॥
Forsaking this world, he entered the abode of Varuna; but before departing he placed a spear in Lavana's keeping and conferred this boon upon him.
english translation