1 Corinthians 16:9 for a great and effective door has opened to me, and there are many adversaries. (WEB NAS RSV NIV)
2 Corinthians 1:6 But if we are troubled, it is for your comfort and salvation; or if we are comforted, it is for your comfort, which takes effect through your quiet undergoing of the same troubles which we undergo: (See NAS)
Philemon 1:6 that the fellowship of your faith may become effective, in the knowledge of every good thing which is in us in Christ Jesus. (WEB NAS)
James 5:16 Confess your offenses to one another, and pray for one another, that you may be healed. The insistent prayer of a righteous person is powerfully effective. (WEB NAS NIV)