Mahabharata 4.4.6

4.4.6

dhaumya uvāca |
vidite cāpi vaktavyaṃ suhṛdbhiranurāgataḥ |
ato'hamapi vakṣyāmi hetumātraṃ nibodhata || 6 ||

Vaisampayana said, "Having thus taken counsel of one another and told one another the offices they would discharge, the Pandavas sought Dhaumya's advice. And Dhaumya also gave them advice in the following words, saying, Ye sons of Pandu, the arrangements ye have made regarding the Brahmanas, yours friends, cars, weapons, and the (sacred) fires, are excellent. But it behoveth thee, O Yudhishthira, and Arjuna specially, to make provision for the protection of Draupadi. Ye king, ye are well-acquainted with the characters of men. Yet whatever may be your knowledge, friends may from affection be permitted to repeat what is already known. Even this is subservient to the eternal interests of virtue, pleasure, and profit. I shall, therefore speak to you something. Mark ye. To dwell with a king is, alas, difficult. I shall tell you, ye princes, how ye may reside in the royal household, avoiding every fault. Ye Kauravas, honourably or otherwise, ye will have to pass this year in the king's palace, undiscovered by those that know you. Then in the fourteenth year, ye will live happy. O son of Pandu, in this world, that cherisher and protector of all beings, the king, who is a deity in an embodied form, is as a great fire sanctified with all the mantras. One should present himself before the king, after having obtained his permission at the gate. No one should keep contact with royal secrets. Nor should one desire a seat which another may covet.