John Gills Exposition of the Bible Commentary - Proverbs 26:27
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 Psalm 7:15 ; and he that rolleth a stone, it will return upon him ; that rolls a stone up hill, if he does not take care, it will return back, and fall with great... read more
Matthew Henry's Complete Commentary - Proverbs 26:27
See here, 1. What pains men take to do mischief to others. As they put a force upon themselves by concealing their design with a profession of friendship, so they put themselves to a great deal of labour to bring it about; it is digging a pit, it is rolling a stone, hard work, and yet men will not stick at it to gratify their passion and revenge. 2. What preparation they hereby make of mischief to themselves. Their violent dealing will return upon their own heads; they shall themselves fall... read more