 अप्रमत्तश्च यो राजा सर्वज्ञो विजितेन्द्रियः।कृतज्ञो धर्मशीलश्च स राजा तिष्ठते चिरम्।। 
 A king who is alert, omniscient, has control over his senses, has a sense of gratitude and one of righteous conduct continues to rule for a long time. 