'King's' in the Bible

Then in the month of Nisan, in the twentieth year of King Artaxerxes, when wine was brought to me, I took the wine and gave it to the king. Previously I had not been depressed in the king's presence.

and a letter for Asaph the keeper of the king's nature preserve, so that he will give me timber for beams for the gates of the fortress adjacent to the temple and for the city wall and for the house to which I go." So the king granted me these requests, for the good hand of my God was on me.

I passed on to the Gate of the Well and the King's Pool, where there was not enough room for my animal to pass with me.