Ramayana
राजन्प्रभुर्यतो ऽस्माकं वसिष्ठो भगवानृषिः । प्रतिशप्तुं न शक्तस्त्वं देवतुल्यं पुरोधसम् ॥ 7-65-30 ॥
"O king, since the venerable seer Vasishtha is our lord and master, you are not able to curse in return the godlike family priest."
english translation