'Pray' in the Bible

Judge of this for your own selves: is it seemly for a woman to pray to God when she is unveiled?

Therefore let a man who has the gift of tongues pray for the power of interpreting them.

For if I pray in an unknown tongue, my spirit prays, but my understanding is barren.

How then does the matter stand? I will pray in spirit, and I will pray with my understanding also. I will praise God in spirit, and I will praise Him with my understanding also.