Matsya Purana 216.18

216.18

rājñastu dakṣiṇe pārśve vāme copaviśettadā.
purastācca tathāpaścādāsanantu vigarhitam .. 216.19 ..

He should not say anything about the unjust deed of the sovereign and should put on the garments, weapons, and ornaments presented to him by the king on momentous occasions He should not give away any of the royal gifts and should not sleep during of the day He should not pass through a forbidden thoroughfare and should not meet the king at an improper place He should take his seat to the right or the left of the king according to his warrant of precedence and not behind or in front of him—16-19