John 14:12-16
12 I tell you the truth, anyone who has faith in me will do what I have been doing. He will do even greater things than these, because I am going to the Father.
13 And I will do whatever you ask in my name, so that the Son may bring glory to the Father. 14 You may ask me for anything in my name, and I will do it.
15 "If you love me, you will obey what I command. 16 And I will ask the Father, and he will give you another Counselor to be with you forever
(NIV)

James 5:13-16
13 Is any one of you in trouble? He should pray. Is anyone happy? Let him sing songs of praise. 14 Is any one of you sick? He should call the elders of the church to pray over him and anoint him with oil in the name of the Lord.
15 And the prayer offered in faith will make the sick person well; the Lord will raise him up. If he has sinned, he will be forgiven. 16 Therefore confess your sins to each other and pray for each other so that you may be healed. The prayer of a righteous man is powerful and effective.
(NIV)