Now, David next contrasts the kind of treatment he deserves versus what this betrayer and his buddies deserve in verses 15-17.
15 {Let/May} death {seize upon/come deceitfully upon/destroy/take by surprise} {them/my enemy},
{and let them/may they} go down {quick/alive} {into/to} {hell/Sheol/the grave}:for {wickedness/evil} is in their {dwellings/dwelling},
{and among them/in their midst}.16 {As for me, I/But I} {will call/shall call/call} {upon/out to} God;
and the LORD {shall/will} {save/deliver} me.17 {i.e., During the…} Evening, and morning, and {at noon/noontime/noon}, {will I/I will/I} {pray, and cry aloud/complain and murmur/lament and moan/cry out in distress}:
and he {shall/will} hear {my voice/me}.
So, look at these two groups.
On the one hand we have David. What’s he doing? He’s praying calling out to God frequently. And on the other hand, we have the enemies. They have wickedness dwelling among them.
And how should they be treated? David is confident that God will deliver him from these men. And on the other hand, he prays to God that he would cause these enemies to not be able to kill him – but that rather the Lord would turn it right around on them and that they would be the ones to die instead of him.
And we can appeal to God like this. We can contrast our behavior with the behavior of those who deal treacherously with us and if we’re blameless in this regard we can ask that the Lord would turn the metaphorical weapons of the enemies back on themselves.