Srimad-Bhagavatam: Canto 10 - Chapter 1 - Verse 7
Sanskrit:
नि:स्वं त्यजन्ति गणिका अकल्पं नृपतिं प्रजा: ।अधीतविद्या आचार्यमृत्विजो दत्तदक्षिणम् ॥ ७ ॥
ITRANS:
niḥsvaṁ tyajanti gaṇikāakalpaṁ nṛpatiṁ prajāḥadhīta-vidyā ācāryamṛtvijo datta-dakṣiṇam
Translation:
Prostitutes abandon a penniless man, subjects an incompetent king, students their teacher once they have finished their education, and priests a man who has remunerated them for a sacrifice.