5 Bible Verses about Prayer Language

In like manner, also, the Spirit helps our infirmities; for we know not what we should pray for as we ought, but the Spirit itself intercedes for us, with groanings unutterable.

For he that speaks in an unknown tongue, speaks not to men, but to God; for no one understands him: but yet in spirit he speaks mysteries.

For if I pray in an unknown tongue, the spirit which I have prays, but my understanding is unfruitful. What, then, is it? I will pray with the spirit which is given to me, and I will pray with my understanding also. I will sing with the spirit that is given to me, and I will sing with my understanding also.

praying with all prayer and supplication, at all times, in the Spirit; and to this end being watchful in all perseverance, and supplication for all the saints:

But you, beloved, building yourselves up on your most holy faith, praying in the Holy Spirit,