No weapon that is formed against thee shall prosper; and every tongue that shall rise against thee in judgment thou shalt condemn. This is the heritage of the servants of the Lord , and their righteousness is of me, saith the Lord Isaiah 54:17 KJV
If God says, “No weapon shall prosper,” that’s exactly what He means. Now you need to believe and say what God says.
If God says you are to condemn every word spoken against you, you should do it. Speaking the Word of God condemns everything that contradicts it.
Remember, your standing and authority is based upon your righteousness and your righteousness is a gift of God in Christ.
To wit, that God was in Christ, reconciling the world unto himself, not imputing their trespasses unto them; and hath committed unto us the word of reconciliation. 2 Corinthians 5:19 KJV
For if by one man’s offence death reigned by one; much more they which receive abundance of grace and of the gift of righteousness shall reign in life by one, Jesus Christ.) Therefore as by the offence of one judgment came upon all men to condemnation; even so by the righteousness of one the free gift came upon all men unto justification of life. For as by one man’s disobedience many were made sinners, so by the obedience of one shall many be made righteous. Romans 5:17-19 KJV