Psalms 7:15
“He made a pit, and digged it, and is fallen into the ditch which he made.”
He hath also prepared for him the instruments of death; he ordaineth his arrows against the persecutors.
Behold, he travaileth with iniquity, and hath conceived mischief, and brought forth falsehood.
He made a pit, and digged it, and is fallen into the ditch which he made.
His mischief shall return upon his own head, and his violent dealing shall come down upon his own pate.
I will praise the Lord according to his righteousness: and will sing praise to the name of the Lord most high.
Counter-Arguments
The strongest case that this verse does not belong in this theme.

Cross-References
“Whoso diggeth a pit shall fall therein: and he that rolleth a stone, it will return upon him.”
“Even as I have seen, they that plow iniquity, and sow wickedness, reap the same.”
“Whoso diggeth a pit shall fall therein: and he that rolleth a stone, it will return upon him.”
“And Harbonah, one of the chamberlains, said before the king, Behold also, the gallows fifty cubits high, which Haman had made for Mordecai, who had spoken good for the king, standeth in the house of Haman. Then the king said, Hang him thereon.”
“Let the wicked fall into their own nets, whilst that I withal escape.”