Psalm 35:7-8

Since they hid their net for me without cause and without cause dug a pit for me, may ruin overtake them by surprise--may the net they hid entangle them, may they fall into the pit, to their ruin. 

Since they hid their net for me 
Job 18:8  "His feet thrust him into a net; he wanders into its mesh."

without cause 
Psalm 7:3-5  LORD my God, if I have done this and there is guilt on my hands--if I have repaid my ally with evil or without cause have robbed my foe--then let my enemy pursue and overtake me; let him trample my life to the ground and make me sleep in the dust.

and without cause have dug a pit for me 
Job 9:30-31  "Even if I washed myself with soap and my hands with cleansing powder, you would plunge me into a slime pit so that even my clothes would detest me."
Psalm 7:15  Whoever digs a hole and scoops it out falls into the pit they have made.
Psalm 55:23  But you, God, will bring down the wicked into the pit of decay; the bloodthirsty and deceitful will not live out half their days. But as for me, I trust in you.

may ruin overtake them by surprise 
Isaiah 47:11  "Disaster will come upon you (Babylon), and you will not know how to conjure it away. A calamity will fall on you that you cannot ward off with a ransom; a catastrophe you cannot foresee will suddenly come upon you."
1 Thessalonians 5:3  While people are saying, "Peace and safety," destruction will come on them suddenly, as labor pains on a pregnant woman, and they will not escape.

may they fall into the pit, to their ruin 
Psalm 7:15  Whoever digs a hole and scoops it out falls into the pit they have made.

(parentheses are mine)

Scriptures taken from the Holy Bible, New International Version® NIV®, Copyright© 1973, 1978, 1984, 2011 by Biblica, Inc.® Used by permission. All rights reserved worldwide. 
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