Ramayana
तत्र मातृष्वसेयस्ते भ्राता ऽयं वै खरः प्रभुः । भविष्यति तवादेशं सदा कुर्वन्निशाचरः ॥ 7-24-37 ॥
"There this Khara, your maternal cousin and your brother, a night-roaming rakshasa, shall be lord, ever carrying out your command.
english translation