'Son' in the Bible

The words of the Preacher, the son of David, king in Jerusalem.

There is one that is alone, and he hath not a second; yea, he hath neither son nor brother; yet is there no end of all his labor, neither are his eyes satisfied with riches. For whom then,'saith he , do I labor, and deprive my soul of good? This also is vanity, yea, it is a sore travail.

and those riches perish by evil adventure; and if he hath begotten a son, there is nothing in his hand.

Happy art thou, O land, when thy king is the son of nobles, and thy princes eat in due season, for strength, and not for drunkenness!

And furthermore, my son, be admonished: of making many books there is no end; and much study is a weariness of the flesh.