Solomon
Proverbs 20:21ESV·traditional attribution

An inheritance gained hastily in the beginning will not be blessed in the end.

Matthew Henry Presbyterian @wholebiblehenry

Note, 1. It is possible that an estate may be suddenly raised. There are those that will be rich, by right or wrong, who make no conscience of what they say or do if they can but get money by it, who, when it is in their power, will cheat their own father, and who sordidly spare and hoard up what they get, grudging themselves...

John Gill Reformed Baptist @doctorgill

An inheritance may be gotten hastily at the beginning,.... Of a man's setting out in the world in trade and business; and which sometimes is got lawfully, and this must be excepted from this proverb; but generally what is got hastily and in a short time is got unlawfully, and so does not prosper.

Jamieson-Fausset-Brown Reformed @jfbcommentary

gotten hastily--contrary to God's providence (Pro 28:20), implying its unjust or easy attainment; hence the man is punished, or spends freely what he got easily (compare Pro 20:17).