'Son' in the Bible

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

There is one alone and without a second; also he hath neither son nor brother: yet is there no end of all his labour, neither is his eye satisfied with riches, and he saith not, For whom then am I labouring, and depriving my soul of good? This also is vanity and a grievous occupation.

or those riches perish by some evil circumstance, and if he have begotten a son, there is nothing in his hand.

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

And besides, my son, be warned by them: of making many books there is no end, and much study is a weariness of the flesh.