1 Corinthians 14:14-16

For if I pray in tongues, my spirit is praying, but I don’t understand what I am saying. Well then, what shall I do? I will pray in the spirit, and I will also pray in words I understand. I will sing in the spirit, and I will also sing in words I understand. For if you praise God only in the spirit, how can those who don’t understand you praise God along with you? How can they join you in giving thanks when they don’t understand what you are saying?