And thus is it written (II Chronicles 14:10) "And Assa called to the L–rd his G–d and he said: 'O L–rd, there is none but You to help both the many and the powerless. Heed, O L–rd our G–d, for upon You did we rely and in Your name have we come against this great throng. O L–rd our G–d, let no man be throned with You.'"
He Begins with a Declaration of God's Unique Power O Lord
Mekhilta Tractate Vayehi Beshalach 3:15