The Gospels are full of examples of how Jesus used “the prayer of faith”. Yes, Jesus actually only used “prayers of faith” prayers when He healed people.
James 5:15 is a promise that the Lord WILL raise up the sick person.
Most Christians, including elders, do not understand what is “prayer of faith”, and therefore see very little results and many sick do not experience that “the Lord is raising him up”.
1. The prayer of faith SHALL save the sick
James 5: 14-18
14 Is any sick among you? 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 SHALL save the sick, and the Lord shall raise him up; and if he have committed sins, they shall be forgiven him.
16 Confess your faults one to another, and pray one for another, that ye may be healed.
The effectual fervent prayer of a righteous man availeth much.
17 Elias was a man subject to like passions as we are,
and he prayed earnestly that it might not rain: and it rained not on the earth by the space of three years and six months.
18 And he prayed again, and the heaven gave rain, and the earth brought forth her fruit.
2. 16a Confess your faults one to another, and pray one for another, that ye may be healed.
Submit yourselves therefore to God. Resist the devil, and he will flee from you. Draw nigh to God, and he will draw nigh to you.
3. 16 b The effectual fervent prayer of a righteous man availeth much.
Fervent is a word that has fallen out of fashion over time, but it is still used in some contexts and can appropriately describe a kind of interaction.
Fervent means "having or displaying a passionate intensity; archaic use: hot, burning, or glowing."
Essentially, to do something fervently is to do it with passion.
In the past, it was used to describe doing something like a burning fire.
When it comes to prayer, fervent prayer is characterised by intensity and a deep connection to the Holy Spirit.
It can take various forms, whether it's expressing intense gratitude, seeking spiritual guidance, or engaging in spiritual warfare.
Fervent prayer can be outward, often involving physical movement, words, and sometimes tears.
However, there are also those who pray inwardly, yet their spirit burns with the same powerful passion as someone who vocalises their prayers.
4. Example of Fervent prayer
Hannah the mother of Samuel prayed silently
1 Samuel 1:10-18
10 In her deep anguish Hannah prayed to the Lord, weeping bitterly. 11 And she made a vow, saying, “Lord Almighty, if you will only look on your servant’s misery and remember me, and not forget your servant but give her a son, then I will give him to the Lord for all the days of his life, and no razor will ever be used on his head.”
12 As she kept on praying to the Lord, Eli observed her mouth.
13 Hannah was praying in her heart, and her lips were moving but her voice was not heard.
Eli thought she was drunk
14 and said to her, “How long are you going to stay drunk? Put away your wine.”
15 “Not so, my lord,” Hannah replied, “I am a woman who is deeply troubled. I have not been drinking wine or beer; I was pouring out my soul to the Lord.
16 Do not take your servant for a wicked woman; I have been praying here out of my great anguish and grief.”
17 Eli answered, “Go in peace, and may the God of Israel grant you what you have asked of him.”
18 She said, “May your servant find favour in your eyes.” Then she went her way and ate something, and her face was no longer downcast.
5. Prayer with Compassion
14 When Jesus landed and saw a large crowd, he had compassion on them and healed their sick.
Compassion literally means “to suffer together.”
Among emotion researchers, it is defined as the feeling that arises when you are confronted with another's suffering and feel motivated to relieve that suffering.
6. The Commanding prayer
The Withered Fig Tree
The next day as they were leaving Bethany, Jesus was hungry.
13 Seeing in the distance a fig tree in leaf, he went to find out if it had any fruit. When he reached it, he found nothing but leaves, because it was not the season for figs.
14 Then he said to the tree, “May no one ever eat fruit from you again.” And his disciples heard him say it.
20 And in the morning, as they passed by, they saw the fig tree dried up from the roots.
21 And Peter calling to remembrance saith unto him, Master, behold, the fig tree which thou cursed is withered away.
22 And Jesus answering saith unto them, Have faith with God.
23 For verily I say unto you, That whosoever shall say unto this mountain, Be thou removed, and be thou cast into the sea; and shall not doubt in his heart, but shall believe that those things which he SAITH shall come to pass; he shall have whatsoever he SAITH.
24 Therefore I say unto you, What things soever ye desire, when ye pray, believe that ye receive them, and ye shall have them.
7. Pray with boldness
Hebrews 4:16 KJVS
Let us therefore come boldly unto the throne of grace, that we may obtain mercy, and find grace to help in time of need.
8. Speak with strength and compassion
Isaiah 40:9 KJVS
O Zion, that bringest good tidings, get thee up into the high mountain; O Jerusalem, that bringest good tidings, lift up thy voice with strength; lift it up, be not afraid; say unto the cities of Judah, Behold your God!
9. Speak to the problem
Mark 11:13-14,20-24 KJVS
And seeing a fig tree afar off having leaves, he came, if haply he might find any thing thereon: and when he came to it, he found nothing but leaves; for the time of figs was not yet
 And Jesus answered and said unto it, No man eat fruit of thee hereafter for ever. And his disciples heard it.
 And in the morning, as they passed by, they saw the fig tree dried up from the roots.
 And Peter calling to remembrance saith unto him, Master, behold, the fig tree which thou cursedst is withered away.
10. Have faith with God.
 And Jesus answering saith unto them, Have faith with God.
 For verily I say unto you, That whosoever shall say unto this mountain, Be thou removed, and be thou cast into the sea; and shall not doubt in his heart, but shall believe that those things which he saith shall come to pass; he shall have whatsoever he saith.
 Therefore I say unto you, What things soever ye desire, when ye pray, believe that ye receive them , and ye shall have them.
11. Faith speaks
Psalm 116:10 KJV
I believed, therefore have I spoken..
2 Corinthians 4:13 KJVS
We having the same spirit of faith, according as it is written, I believed, and therefore have I spoken; we also believe, and therefore speak;
Jesus spoke to the tree
No man eats the fruit of you from now and forever.
12. Agreement prayer
“Again, truly I tell you that if two of you on earth agree about anything they ask for, it will be done for them by my Father in heaven.
20 For where two or three gather in my name, there I am with them.”