Ramayana
सत्यं ते प्रतिजानामि भ्रातृतुल्यो ऽधिको ऽपि वा । भविष्याम्योजसा चैव सन्तापं त्यज हृद्गतम् ॥ 7-9-45 ॥
"Truly I promise you that I shall become the equal of my brother, or even greater than he, in might; so cast off the grief that lies in your heart."
english translation