Srimad-Bhagavatam: Canto 9 - Chapter 1 - Verse 14-15

Sanskrit:

शान्तिमाप्नोति चैवाग्र्यां कर्मणा तेन शान्तनु: ।समा द्वादश तद्राज्ये न ववर्ष यदा विभु: ॥ १४ ॥शान्तनुर्ब्राह्मणैरुक्त: परिवेत्तायमग्रभुक् ।राज्यं देह्यग्रजायाशु पुरराष्ट्रविवृद्धये ॥ १५ ॥

ITRANS:

śāntim āpnoti caivāgryāṁkarmaṇā tena śāntanuḥsamā dvādaśa tad-rājyena vavarṣa yadā vibhuḥ

Translation:

Because the King was able to make everyone happy for sense gratification, primarily by the touch of his hand, his name was Śāntanu. Once, when there was no rainfall in the kingdom for twelve years and the King consulted his learned brahminical advisors, they said, “You are faulty for enjoying the property of your elder brother. For the elevation of your kingdom and home, you should return the kingdom to him.”

Purport:

One cannot enjoy sovereignty or perform an agnihotra-yajña in the presence of one’s elder brother, or else one becomes a usurper, known as parivettā.