God wants us to pray for the unreached. And when we ask Him to show us how to pray better... we are asking for something good--something He wants to do!
Based on 1 Peter 2:9-10, here is God's latest answer to my prayer:
Heavenly Father... We pray for the Unreached People Groups of the world. Many of them are a chosen people, God’s special possession. May they declare your praises, God, for you are calling them out of darkness into your wonderful light. Let it be said that, "Once, they were an unreached people group, but now they are the people of God."
After any prayer based on God's word and according to His will, we can also pray, based on Isaiah 55:11:
God, these are your words that I've just prayed. So I trust they will not return to me empty. They will accomplish your desire and your purpose!
In Jesus' name, Amen.