Solomon
Proverbs 26:26ESV·traditional attribution

though his hatred be covered with deception, his wickedness will be exposed in the assembly.

Matthew Henry Presbyterian @wholebiblehenry

There is cause to complain, not only of the want of sincerity in men's profession of friendship, and that they do not love so well as they pretend nor will serve their friends so much as they promise, but, which is much worse, of wicked designs in the profession of friendship, and the making of it subservient to the most malicious intentions.

Commenting on Proverbs 26:24-26

John Gill Reformed Baptist @doctorgill

Whoso diggeth a pit shall fall therein,.... That devises mischief against others, it shall come upon himself. The allusion is to the digging of pits for catching wild beasts, which are slightly covered with earth; and which sometimes the pursuers, through inadvertency, fall into themselves; the passage seems to be taken from Psa 7:15; and he that rolleth a stone, it will return upon him...

Jamieson-Fausset-Brown Reformed @jfbcommentary

Deceit will at last be exposed, and the wicked by their own arts often bring on retribution (compare Pro 12:13; Psa 7:16; Psa 9:17, &c.).