With my mouth; with a loud voice and great fervency: or it is a pleonasm, as Psalms 44:1, We have heard with our ears. Extolled, i.e. praised by me, to wit, for answering my prayers.
Related Commentaries of Psalms 66:17
Psalms 66:17
17 I cried unto him with my mouth, and he was extolled with my tongue.