Mahabharata 2.33.22

2.33.22

tato bhīṣmo'bravīdrājandharmarājaṃ yudhiṣṭhiram |
kriyatāmarhaṇaṃ rājñāṃ yathārhamiti bhārata || 22 ||

"Then Bhishma, O king, addressing king Yudhisthira the just, said, "O Bharata, let Arghya (an article of respect) be offered unto the kings as each of them deserveth. Listen, O Yudhishthira, the preceptor, the sacrificial priest, the relative, the Snataka, the friend, and the king, it hath been said are the six that deserve Arghya. The wise have said that when any of these dwell with one for full one year he deserveth to be worshipped with Arghya. These kings have been staying with us for some time. Therefore, O king, let Arghyas be procured to be offered unto each of them. And let an Arghya be presented first of all unto him among those present who is the foremost.