'Rule' in the Bible

In the third year of his rule he gave a feast to all his captains and his servants; and the captains of the army of Persia and Media, the great men and the rulers of the divisions of his kingdom, were present before him;

So Esther was taken in to King Ahasuerus in his house in the tenth month, which is the month Tebeth, in the seventh year of his rule.

Now on the thirteenth day of the twelfth month, which is the month Adar, when the time came for the king's order to be put into effect, on the very day when the haters of the Jews had been hoping to have rule over them; though the opposite had come about, and the Jews had rule over their haters;

The Jews made a rule and gave an undertaking, causing their seed and all those who were joined to them to do the same, so that it might be in force for ever, that they would keep those two days, as ordered in the letter, at the fixed time every year;