1 Corinthians 14:15 – I will pray with Spirit, and I will also pray with understanding. I will sing with the Spirit, and I will also sing with understanding.
Praying in tongues is a universal benefit for all believers. It is not a requirement or proof of salvation; rather, it is a benefit available to us through the work of Jesus and the indwelling of the Spirit. It is not reserved for those with a special calling. It does not require any special training, qualification, or preparation. It is a free gift to all because of the blood of Jesus. – Mike Bickle “Growing in Prayer”
1 Corinthians 14:39 – Therefore, desire earnestly to prophesy, and do not forbid to speak in tongues.