Ramayana
यमेन्द्रवरुणानां च पदं यत्तव चेप्सितम् । तद्गच्छ त्वं हि धर्मज्ञ निधीशत्वमवाप्नुहि । शक्राम्बुपयमानां च चतुर्थस्त्वं भविष्यसि ॥ 7-3-18 ॥
"Whichever station among those of Yama, Indra, and Varuna is desired by you, go to it, O knower of dharma, and attain the lordship of the treasures; you shall become the fourth alongside Shakra, the lord of the waters (Varuna), and Yama."
english translation