Albert Barnes Commentary Psalms 119:86

"All thy commandments are faithful: They persecute me wrongfully; help thou me." — Psalms 119:86 (ASV)

All thy commandments are faithful - Margin, “faithfulness.” The idea in the Hebrew is that they are worthy to be relied on. They are founded in truth, and they should secure our confidence.

They persecute me wrongfully ... - Hebrew, a “lie,” or “falsehood.” That is, There is a “lie” or “falsehood” at the foundation of their persecutions. Those persecutions are not based on any just views of what I am, or of the treatment which I ought to receive at the hand of my fellow men. They charge on me things which are not true, and they act accordingly. See the notes at Psalm 119:78.