Mahabharata 12.67.32

12.67.32

evaṃ ye bhūtimiccheyuḥ pṛthivyāṃ mānavāḥ kvacit |
kuryū rājānamevāgre prajānugrahakāraṇāt || 32 ||

"Those, O Yudhishthira, those men on earth who desire prosperity should first elect and crown a king for the protection of all. Like disciples humbling themselves in the presence of the preceptors or the gods in the presence of Indra, all men should humble themselves before the king. One that is honoured by his own people becomes an object of regard with his foes also, while one that is disregarded by his own is overridden by foes. If the king be overridden by his foes, all his subjects become unhappy. Therefore, umbrellas and vehicles and outward ornaments, and viands, and drinks, and mansions, and seats, and beds, and all utensils for use and show, should be assigned to the king. By such means the king will succeed in discharging his duties of protection (the better) and become irresistible. He should speak with smiles. Addressed sweetly by others, he should address others sweetly. Grateful (to those that serve him), firmly devoted (to those that deserve his respect), and with passions under control, he should give unto others their due. Looked upon by others he should look at them mildly, sweetly, and handsomely.'