Do not keep silent, O God of my praise!
For the mouth of the wicked and the mouth of the deceitful
Have opened against me;
They have spoken against me with a lying tongue.
They have also surrounded me with words of hatred,
And fought against me without a cause.
In return for my love they are my accusers,
But I give myself to prayer. Psa 109:1-4
How did the wicked wrong the righteous? Through his mouth, by lying about him or speaking lies concerning him. The wicked surrounded the righteous with words of hatred. The righteous did good to him, but the wicked accused him in return. In response, the righteous did not defend himself, but he gave himself to prayer.
Set a wicked man over him, and let an accuser stand at his right hand. Psa 109:6
The Hebrew word for “accuser” is satan. This might even be in the footnote of your Bible.
The proper name of the devil, Satan, means “accuser” in Hebrew. This throws light on Rev 12:9-11! The devil begins his work with his mouth. Remember that Jesus said of him, that he was a liar and the father of lies (Joh 8:44)? When we think of wickedness, we tend to think of actions. But wickedness begins with thoughts, first, and proceeds to words, which are just voiced thoughts.
So that is why, whenever you hear the accusation in your heart, you know who is speaking that to you. It is not God. God edifies and encourages. God said to Gideon, who was hiding in the wine press, “Hail, you mighty man of valor!”
When we allow our mouths to be used to accuse another, we have just partnered with Satan in his work. Let not a wicked mouth be found among us, O God!