SAMEK
113 I hate the double-minded,
But I love Your law.
114 You are my hiding place and my shield;
I hope in Your word.
115 Depart from me, you evildoers,
For I will keep the commandments of my God!
116 Uphold me according to Your word, that I may live;
And do not let me be ashamed of my hope.
117 Hold me up, and I shall be safe,
And I shall observe Your statutes continually.
118 You reject all those who stray from Your statutes,
For their deceit is falsehood.
119 You put away all the wicked of the earth like dross;
Therefore I love Your testimonies.
120 My flesh trembles for fear of You,
And I am afraid of Your judgments.
The psalmist here tells how the Word of God protects him from false teachers.
It is precisely to this event [when Messiah takes the throne in Jerusalem] of the inevitable divine triumph over all evil and evildoers (v.115, referring not just to sinners—which we all are—but to those who live by sin in opposition to God and encourage others to do the same, as in Isaiah 9:17; Psalm 26:5; Proverbs 17:4; etc.) that the psalmist refers by his declaration in verse 119 “Thous hast removed all the wicked of the earth like dross”—in which the past tense verb is intended to underscore the absolute certainty of the event described. — Wechsler, pages 286-287.
__________
False teaching leads into sin; and, consequently, false teachers are evil-doers (v.115). Their efforts, however, only resulted in attaching the Messiah, if it were possible, more resolutely to the commandments of God (v.115). …
The appalling doom awaiting these teachers caused Messiah’s heart to love the Sacred Book which predicts their destruction (v.119); whilst, at the same time, His sinless flesh shuddered with horror at the nature of that judgment (v.120). — Williams, page 396.
dross (v.119) = the scum that forms on the surface of molten metal as a result of oxidation, hence, waste, worthless, refuse.