'Ruler' in the Bible

I saw all the living under the sun round the young man who was to be ruler in place of the king.

No man has authority over the wind, to keep the wind; or is ruler over the day of his death. In war no man's time is free, and evil will not keep the sinner safe.

The words of the wise which come quietly to the ear are noted more than the cry of a ruler among the foolish.

If the wrath of the ruler is against you, keep in your place; in him who keeps quiet even great sins may be overlooked.

There is an evil which I have seen under the sun, like an error which comes by chance from a ruler:

Happy is the land whose ruler is of noble birth, and whose chiefs take food at the right time, for strength and not for feasting.