One who digs a pit may ¹  fall into it, and one who breaks through a wall may be bitten by a snake. ² 

“If a man opens a pit or if a man digs a pit and does not cover it, and an ox or a donkey falls into it,

A wicked scoundrel ¹  digs up ²  evil, and his slander ³  is like a scorching fire. ⁴ 

The one who digs a pit ¹  will fall into it; the one who rolls a stone – it will come back on him.

he digs a pit ¹  and then falls into the hole he has made. ²