Ramayana
त्रैलोक्ये नास्ति यो द्वन्द्वं मम दद्यान्नराधिप । शङ्के प्रसक्तो भोगेषु न शृणोषि बलं मम ॥ 7-19-25 ॥
In the three worlds there is none, O ruler of men, who can offer me single combat. I suspect that, being addicted to pleasures, you had not heard of my strength."
english translation