The Catholic Church promotes the intercession of the Saints. The Bible specifies that the saints and their intercession are very important to us. Here are some quotes from the Bible regarding the importance of the Saints.
Revelation 8:3-4
And another angel came and stood at the altar with a golden censer, and he was given much incense to offer with the prayers of all the saints on the golden altar before the throne, and the smoke of the incense, with the prayers of the saints, rose before God from the hand of the angel.
James 5:16
Therefore, confess your sins to one another and pray for one another, that you may be healed. The prayer of a righteous person has great power as it is working.
1 Timothy 2:5
For there is one God, and there is one mediator between God and men, the man Christ Jesus,
Ephesians 6:18
Praying at all times in the Spirit, with all prayer and supplication. To that end, keep alert with all perseverance, making supplication for all the saints,
Revelation 5:8
And when he had taken the scroll, the four living creatures and the twenty-four elders fell down before the Lamb, each holding a harp, and golden bowls full of incense, which are the prayers of the saints.
Hebrews 7:25
Consequently, he is able to save to the uttermost those who draw near to God through him, since he always lives to make intercession for them.
Revelation 8:4
And the smoke of the incense, with the prayers of the saints, rose before God from the hand of the angel.
1 Timothy 2:1
First of all, then, I urge that supplications, prayers, intercessions, and thanksgivings be made for all people,
Hebrews 12:1
Therefore, since we are surrounded by so great a cloud of witnesses, let us also lay aside every weight, and sin which clings so closely, and let us run with endurance the race that is set before us,
Romans 8:34
Who is to condemn? Christ Jesus is the one who died—more than that, who was raised—who is at the right hand of God, who indeed is interceding for us.
1 Timothy 2:1-4
First of all, then, I urge that supplications, prayers, intercessions, and thanksgivings be made for all people, for kings and all who are in high positions, that we may lead a peaceful and quiet life, godly and dignified in every way. This is good, and it is pleasing in the sight of God our Savior, who desires all people to be saved and to come to the knowledge of the truth.
Job 42:8
Now therefore take seven bulls and seven rams and go to my servant Job and offer up a burnt offering for yourselves. And my servant Job shall pray for you, for I will accept his prayer not to deal with you according to your folly. For you have not spoken of me what is right, as my servant Job has.”
Revelation 8:3
And another angel came and stood at the altar with a golden censer, and he was given much incense to offer with the prayers of all the saints on the golden altar before the throne,
Romans 15:30
I appeal to you, brothers, by our Lord Jesus Christ and by the love of the Spirit, to strive together with me in your prayers to God on my behalf,
John 14:6
Jesus said to him, “I am the way, and the truth, and the life. No one comes to the Father except through me.
Hebrews 12:22-24
But you have come to Mount Zion and to the city of the living God, the heavenly Jerusalem, and to innumerable angels in festal gathering, and to the assembly of the firstborn who are enrolled in heaven, and to God, the judge of all, and to the spirits of the righteous made perfect, and to Jesus, the mediator of a new covenant, and to the sprinkled blood that speaks a better word than the blood of Abel.
Philemon 1:22
At the same time, prepare a guest room for me, for I am hoping that through your prayers I will be graciously given to you.
Genesis 20:17
Then Abraham prayed to God, and God healed Abimelech, and also healed his wife and female slaves so that they bore children.
Revelation 14:12
Here is a call for the endurance of the saints, those who keep the commandments of God and their faith in Jesus.
Matthew 5:44
But I say to you, Love your enemies and pray for those who persecute you,
Philippians 1:19
For I know that through your prayers and the help of the Spirit of Jesus Christ this will turn out for my deliverance,
Revelation 8:1-13
When the Lamb opened the seventh seal, there was silence in heaven for about half an hour. Then I saw the seven angels who stand before God, and seven trumpets were given to them. And another angel came and stood at the altar with a golden censer, and he was given much incense to offer with the prayers of all the saints on the golden altar before the throne, and the smoke of the incense, with the prayers of the saints, rose before God from the hand of the angel. Then the angel took the censer and filled it with fire from the altar and threw it on the earth, and there were peals of thunder, rumblings, flashes of lightning, and an earthquake. …
1 John 5:14-15
And this is the confidence that we have toward him, that if we ask anything according to his will he hears us. And if we know that he hears us in whatever we ask, we know that we have the requests that we have asked of him.
Romans 8:26
Likewise, the Spirit helps us in our weakness. For we do not know what to pray for as we ought, but the Spirit himself intercedes for us with groanings too deep for words.
1 Samuel 12:23
Moreover, as for me, far be it from me that I should sin against the Lord by ceasing to pray for you, and I will instruct you in the good and the right way.
Genesis 20:7
Now then, return the man’s wife, for he is a prophet, so that he will pray for you, and you shall live. But if you do not return her, know that you shall surely die, you and all who are yours.”
Revelation 19:10
Then I fell down at his feet to worship him, but he said to me, “You must not do that! I am a fellow servant with you and your brothers who hold to the testimony of Jesus. Worship God.” For the testimony of Jesus is the spirit of prophecy.
Romans 8:38-39
For I am sure that neither death nor life, nor angels nor rulers, nor things present nor things to come, nor powers, nor height nor depth, nor anything else in all creation, will be able to separate us from the love of God in Christ Jesus our Lord.
Romans 8:26-27
Likewise the Spirit helps us in our weakness. For we do not know what to pray for as we ought, but the Spirit himself intercedes for us with groanings too deep for words. And he who searches hearts knows what is the mind of the Spirit, because the Spirit intercedes for the saints according to the will of God.
Leviticus 20:27
“A man or a woman who is a medium or a necromancer shall surely be put to death. They shall be stoned with stones; their blood shall be upon them.”
Colossians 1:9-12
And so, from the day we heard, we have not ceased to pray for you, asking that you may be filled with the knowledge of his will in all spiritual wisdom and understanding, so as to walk in a manner worthy of the Lord, fully pleasing to him: bearing fruit in every good work and increasing in the knowledge of God; being strengthened with all power, according to his glorious might, for all endurance and patience with joy; giving thanks to the Father, who has qualified you to share in the inheritance of the saints in light.