Psalm 140: 8-11  David prays against the enemy.
Do not grant their desires. ( What they covet, lust, or long for)
Do not promote their evil device ( plot)
Cover their heads, not with salvation, but with "the mischief of their lips" and burning coals.
( mischief - toil, wearing effort, worry, iniquity, labor, miserable,misery, painful, perverseness, sorrow, toil, travail, trouble, wearisome wickedness.) ; ( cover - clothe, hide, fill up)
Cast them into the fire. Into deep pits where they can't get out.
Don't allow a slanderer be established. ( slanderer - evil speaker; established - fixed, erect, prosperous, proper )
Let evil "hunt the violent man speedily"
 David prays defensively in v. 1-7, and uses the offense in these verses.  He looks to Jehovah Adonai, establishing his relationship with Him, his Salvation, before he hands over the enemy into the Hands of Almighty God.  He makes sure he has dealt with the stone in his own eye before he asks God to deal with that in the eye of his enemy.  Our first order of prayer must be to place ourselves at the feet of our Lord, coming into His Presence, humbly and in faith.  Then we can bring to Him our requests against the enemy.  We must put on the full armor of God before we go to battle against "the rulers, against the powers, against the world forces of this darkness, against the spiritual forces of wickedness in the heavenly places."

I Thess. 4-5  The will of God for us is sanctification. ( v3) . To walk in a manner that pleases God.  To excel in purity.  To Paul this is abstaining from immorality and impurity, lust and defrauding one another.  It means to excel in love.  To take care of our own lives and to be generous with those in need.
Again Paul focuses on the coming of The Lord Jesus, Who " will descend from heaven with a shout, with the voice of the archangel, and with the trumpet of God; "  He teaches here about those who are "asleep"  and those who are awake. And that no matter which we are, we will be with Jesus! That is if we are "sons of light" , of the day, walking in the Truth. Sober, clothed in faith and love, and with the helmet of salvation on our heads.  It is fitting that Paul's final prayer in this book is for our sanctification.  " Now may the God of peace Himself sanctify you entirely and may your spirit and soul and body be preserved complete, without blame at the coming of The Lord Jesus Christ."  v 23
"Faithful is He who calls you, and He also will bring it to pass."  Amen.