Romans 8:26-27 In the same way, the Spirit helps us in our weakness. We do not know what we ought to pray for, but the Spirit himself intercedes for us with groans that words cannot express. And he who searches our hearts knows the mind of the Spirit, because the Spirit intercedes for the saints in accordance with God's will. (NIV)

"Be joyful always; pray continually; give thanks in all circumstances, for this is God's will for you in Christ Jesus" (1 Thessalonians 5:16-18).

"…The prayer of a righteous man is powerful and effective" (James 5:16).

"This is the confidence we have in approaching God: that if we ask anything according to his will, he hears us. And if we know that he hears us - whatever we ask - we know that we have what we asked of him" (1 John 5:14-15).

"Do not be anxious about anything, but in everything, by prayer and petition, with thanksgiving, present your requests to God. And the peace of God, which transcends all understanding, will guard your hearts and your minds in Christ Jesus" (Philippians 4:6-7).