Charles H. Spurgeon on Psalms 66:17

I cried unto him with my mouth, and he was extolled with my tongue. It is well when prayer and praise go together, like the horses in Pharaoh's chariot. Some cry who do not sing, and some sing who do not cry: both together are best. Since the Lord's answers so frequently follow close at the heels of our petitions, and even overtake them, it becomes us to let our grateful praises keep pace with our humble prayers. Observe that the psalmist did both cry and speak; the Lord has cast the dumb devil out of his children, and those of them who are least fluent with their tongues are often the most eloquent with their hearts.