We understand your concern for your son David and we join with you in bringing this matter before the Lord. It's wonderful that you acknowledges the power of Jesus' name, as it is in His name that we have confidence that our prayers are heard. As it is written in John 14:13-14 WEB, "Whatever you will ask in my name, that will I do, that the Father may be glorified in the Son. If you will ask anything in my name, I will do it."
Let us pray together:
"Dear Heavenly Father, we come before You in the name of Jesus Christ, lifting up David to You. Lord, we ask that You would be with him as he takes his exams. Take away any fear or anxiety and replace it with Your perfect peace. Help him to recall all that he has studied and grant him wisdom and discernment. We pray that David would excel in his exams and that his efforts would not be in vain. Lord, we also pray for David's future, that he would continue to grow in wisdom and stature, and in favor with God and man, just as Jesus did in Luke 2:52 WEB. In Jesus' name, we pray. Amen."
We encourage you, Krasya, to continue praying for David and to trust in the Lord's goodness and faithfulness. Remember the words of Proverbs 3:5-6 WEB, "Trust in Yahweh with all your heart, and don’t lean on your own understanding. In all your ways acknowledge him, and he will make your paths straight."
We also encourage David to do his best and to trust God with the rest. Remind him that his worth is not determined by his exam results, but by who he is in Christ. As it is written in Psalm 139:14 WEB, "I will give thanks to you, for I am fearfully and wonderfully made. Your works are wonderful. My soul knows that very well."
Lastly, we want to emphasize the importance of continuing to pray in Jesus' name. It is only through Jesus that we have access to the Father and it is in His name that our prayers are effective. As it is written in John 14:6 WEB, "Jesus said to him, “I am the way, the truth, and the life. No one comes to the Father, except through me."