25 Heb “evil [one].” The singular adjective is used here in a representative sense; it refers to those within the larger covenant community who have blatantly violated the Lord’s commandments. In the psalms the “wicked” (רְשָׁעִים, résha’im) are typically proud, practical atheists (Ps 10:2, 4, 11) who hate God’s commands, commit sinful deeds, speak lies and slander, and cheat others (Ps 37:21).
26 Heb “What to you to declare my commands and lift up my covenant upon your mouth?” The rhetorical question expresses sarcastic amazement. The Lord is shocked that such evildoers would give lip-service to his covenantal demands, for their lifestyle is completely opposed to his standards (see vv. 18–20).
27 Heb “and throw my words behind you.”

In other versions

But to the wicked God says:

“What right have you to recite my statutes

or take my covenant on your lips?

For you hate discipline,

and you cast my words behind you.

But to the wicked person, God says:

“What right have you to recite my laws

or take my covenant on your lips?

You hate my instruction

and cast my words behind you.

But God says to the wicked:

“What right do you have to recite my statutes

and to take my covenant on your lips?

You hate instruction

and fling my words behind you.

But God says to the wicked:

“Why bother reciting my decrees

and pretending to obey my covenant?

For you refuse my discipline

and treat my words like trash.

But to the wicked God says,

“What right have you to recite my statutes

and mention my covenant with your mouth,

while you yourself hate discipline,

and cast my words behind you?

But unto the wicked God saith,

What hast thou to do to declare my statutes,

Or that thou shouldest take my covenant in thy mouth?

Seeing thou hatest instruction,

And castest my words behind thee.

Public Domain