Adam Clarke's Bible Commentary Verse 2. The mouth of the wicked and-the deceitful are opened against me ] Many persons are continually uttering calumnies against me. Thou knowest my heart and its innocence; vindicate my uprightness against these calumniators.
Matthew Henry Commentary
Verses 1-5 - It is the unspeakable comfort of all believers, that whoever is agains them, God is for them; and to him they may apply as to one pleased to concern himself for them. David's enemies laughed at him for his devotion, but they could not laugh him out of it.
Original Hebrew כי3588 פי6310 רשׁע7563 ופי6310 מרמה4820 עלי5921 פתחו6605 דברו1696 אתי854 לשׁון3956 שׁקר׃8267