Ramayana
यक्षा न शेकुः संस्थातुं प्रमुखे तस्य रक्षसः । राज्ञो भ्रातेति विज्ञाय गता यत्र धनेश्वरः ॥ 7-14-5 ॥
the Yakshas were unable to stand before that Rakshasa; and recognizing him as the king's brother, they went to where the Lord of Wealth, Kubera, was.
english translation