Mark 9:38-41 Revised Standard Version (RSV)
38 John said to him, “Teacher, we saw a man casting out demons in your name,[a] and we forbade him, because he was not following us.” 39 But Jesus said, “Do not forbid him; for no one who does a mighty work in my name will be able soon after to speak evil of me. 40 For he that is not against us is for us. 41 For truly, I say to you, whoever gives you a cup of water to drink because you bear the name of Christ, will by no means lose his reward.
James 5:13-20 Revised Standard Version (RSV)
The Prayer of Faith
13 Is any one among you suffering? Let him pray. Is any cheerful? Let him sing praise. 14 Is any among you sick? Let him call for the elders of the church, and let them pray over him, anointing him with oil in the name of the Lord; 15 and the prayer of faith will save the sick man, and the Lord will raise him up; and if he has committed sins, he will be forgiven. 16 Therefore confess your sins to one another, and pray for one another, that you may be healed. The prayer of a righteous man has great power in its effects. 17 Eli′jah was a man of like nature with ourselves and he prayed fervently that it might not rain, and for three years and six months it did not rain on the earth. 18 Then he prayed again and the heaven gave rain, and the earth brought forth its fruit.
19 My brethren, if any one among you wanders from the truth and some one brings him back, 20 let him know that whoever brings back a sinner from the error of his way will save his soul from death and will cover a multitude of sins.