Ramayana
बलवान्दुर्जयश्चैव भविष्यत्येव राक्षसः । यं समाश्रित्य ते राजन्स्थापितास्त्रिदशा वशे ॥ 7-30-6 ॥
"This rakshasa shall indeed become mighty and unconquerable, the one relying upon whom, O king, you have kept the gods under your control."
english translation