Passage
Oh that You would slay the wicked, O God! O men of bloodshed, depart from me.
Oh that You would slay the wicked, O God! O men of bloodshed, depart from me.
Psalms 139:17 How precious are Your thoughts to me, O God! How vast is the sum of them!
Psalms 139:18 If I should count them, they would outnumber the sand. When I awake, I am still with You.
Psalms 139:19 Oh that You would slay the wicked, O God! O men of bloodshed, depart from me.
Psalms 139:20 For they speak against You wickedly, And Your enemies take Your name in vain.
Psalms 139:21 Do I not hate those who hate You, O Yahweh? And do I not revile those who rise up against You?
The verse centers on "slay", "wicked", "bloodshed", and "depart". It is saying that the verse draws attention to "slay" and "wicked", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 18's "If I should count them they would..." into verse 20's "For they speak against You wickedly And...", so "slay" and "wicked" belong inside that flow. In Psalms context, the local focus is worship, trust, the LORD's kingship, and covenant mercy.
A plain takeaway is to answer the verse's own emphasis on "slay" and "wicked" with trust shaped by these words, not by a vague optimism outside the passage.