5 Bible Verses about Prayer Language

In the same way, the Spirit also helps our weaknesses, for we do not know how to pray as we ought. But the Spirit himself makes intercession for us with groanings which cannot be uttered.

For he who speaks in another language speaks not to men, but to God; for no one understands; but in the Spirit he speaks mysteries.

For if I pray in another language, my spirit prays, but my understanding is unfruitful. What is it then? I will pray with the spirit, and I will pray with the understanding also. I will sing with the spirit, and I will sing with the understanding also.

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

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