A. Scriptural authority for asking for healing:

EXO 15:26. And said, If thou wilt diligently hearken to the voice of the LORD thy God, and wilt do that which is right in his sight, and wilt give ear to his commandments, and keep all his statutes, I will put none of these diseases upon thee, which I have brought upon the Egyptians: for I am the LORD that healeth thee.

DEU 7:15. And the LORD will take away from thee all sickness, and will put none of the evil diseases of Egypt, which thou knowest, upon thee; but will lay them upon all them that hate thee.

PSA 84:11. For the LORD God is a sun and shield: the LORD will give grace and glory: no good thing will he withhold from them that walk uprightly.

PSA 103:3. Who forgiveth all thine iniquities; who healeth all thy diseases;

PSA 107:20. He sent his word, and healed them, and delivered them from their destructions.

JER 30:17. For I will restore health unto thee, and I will heal thee of thy wounds, saith the LORD; because they called thee an Outcast, saying, This is Zion, whom no man seeketh after.

MAL 4:2. But unto you that fear my name shall the Sun of righteousness arise with healing in his wings; and ye shall go forth, and grow up as calves of the stall.

MAT 10:1. And when he had called unto him his twelve disciples, he gave them power against unclean spirits, to cast them out, and to heal all manner of sickness and all manner of disease.

MAR 1:40. And there came a leper to him, beseeching him, and kneeling down to him, and saying unto him, If thou wilt, thou canst make me clean.

MAR 1:41. And Jesus, moved with compassion, put forth his hand, and touched him, and saith unto him, I will; be thou clean.

ACT 9:34. And Peter said unto him, Aeneas, Jesus Christ maketh thee whole: arise, and make thy bed. And he arose immediately.

JAM 5:15. And the prayer of faith shall save the sick, and the Lord shall raise him up; and if he have committed sins, they shall be forgiven him.

EZE 34:16. I will seek that which was lost, and bring again that which was driven away, and will bind up that which was broken, and will strengthen that which was sick: but I will destroy the fat and the strong; I will feed them with judgment.

3JO 1:2. Beloved, I wish above all things that thou mayest prosper and be in health, even as thy soul prospereth.

B. God prefers not to afflict you; He'd rather heal:

LAM 3:33. For he doth not afflict willingly nor grieve the children of men.

PSA 22:24. For he hath not despised nor abhorred the affliction of the afflicted; neither hath he hid his face from him; but when he cried unto him, he heard.

HEB 12:13. And make straight paths for your feet, lest that which is lame be turned out of the way; but let it rather be healed.

C. Jesus' physical suffering paid for our healing:

ISA 53:5. But he was wounded for our transgressions, he was bruised for our iniquities: the chastisement of our peace was upon him; and with his stripes we are healed.

MAT 8:16. When the even was come, they brought unto him many that were possessed with devils: and he cast out the spirits with his word, and healed all that were sick:

MAT 8:17. That it might be fulfilled which was spoken by Esaias the prophet, saying, Himself took our infirmities, and bare our sicknesses.

1CO 11:23. For I have received of the Lord that which also I delivered unto you, That the Lord Jesus the same night in which he was betrayed took bread:

1CO 11:24. And when he had given thanks, he brake it, and said, Take, eat: this is my body, which is broken for you: this do in remembrance of me.

1CO 11:29. For he that eateth and drinketh unworthily, eateth and drinketh damnation to himself, not discerning the Lord's body.

1CO 11:30. For this cause many are weak and sickly among you, and many sleep.