“Then likewise a man appeared, distinguished by his gray hair and dignity, and of marvelous majesty and authority. And [Onias] spoke, saying, “This is a man who loves the brethren and prays much for the people and the holy city, Jeremiah, the prophet of God.””
Short answer
The Church forbids conjuring the dead and every kind of divination. Asking the saints to pray for us is a different act. Those who have died in Christ are alive with him, and they pray for us as members of the one body. Their prayer depends wholly on Christ, the one mediator, and every gift asked for comes from God.
Drafted from primary sources. Every quotation is checked against the page it links to.
Where this teaching appears on the Offshoots timelines: January 1523, No prayer to the saints.
16 quotations in date order
“And as for the dead being raised, have you not read in the book of Moses, in the passage about the bush, how God said to him, ‘I am the God of Abraham, and the God of Isaac, and the God of Jacob’? He is not God of the dead, but of the living; you are quite wrong.”
“First of all, then, I urge that supplications, prayers, intercessions, and thanksgivings be made for all men … This is good, and it is acceptable in the sight of God our Savior, who desires all men to be saved and to come to the knowledge of the truth. For there is one God, and there is one mediator between God and men, the man Christ Jesus,”
“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 first-born who are enrolled in heaven, and to a judge who is God of all, and to the spirits of just men made perfect, and to Jesus, the mediator of a new covenant,”
“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 with golden bowls full of incense, which are the prayers of the saints;”
“He also prays in the society of angels, as being already of angelic rank, and he is never out of their holy keeping; and though he pray alone, he has the choir of the saints standing with him.”
“…when we have the favour of God, we have also the good-will of all angels and spirits who are friends of God. For they know who are worthy of the divine approval, and they are not only well disposed to them, but they co-operate with them in their endeavours to please God: they seek His favour on their behalf; with their prayers they join their own prayers and intercessions for them. … These, even when not asked, pray with them”
“Let us on both sides always pray for one another. Let us relieve burdens and afflictions by mutual love, that if any one of us, by the swiftness of divine condescension, shall go hence the first, our love may continue in the presence of the Lord, and our prayers for our brethren and sisters not cease in the presence of the Father's mercy.”
“Then we commemorate also those who have fallen asleep before us, first Patriarchs, Prophets, Apostles, Martyrs, that at their prayers and intercessions God would receive our petition.”
“If Apostles and martyrs while still in the body can pray for others, when they ought still to be anxious for themselves, how much more must they do so when once they have won their crowns, overcome, and triumphed?”
“But our martyrs are not our gods; for we know that the martyrs and we have both but one God, and that the same.”
“Prayer is offered to a person in two ways: first, as to be fulfilled by him, secondly, as to be obtained through him. On the first way we offer prayer to God alone, since all our prayers ought to be directed to the acquisition of grace and glory, which God alone gives … This is also clear from the very style employed by the Church in praying: since we beseech the Blessed Trinity "to have mercy on us," while we ask any of the saints "to pray for us."”
“…the saints, who reign together with Christ, offer up their own prayers to God for men … but that they think impiously, who deny that the saints, who enjoy eternal happiness in heaven, are to be invocated; or who assert either that they do not pray for men; or, that the invocation of them to pray for each of us even in particular, is idolatry; or, that it is repugnant to the word of God; and is opposed to the honour of the one mediator of God and men, Christ Jesus”
“For just as Christian communion among wayfarers brings us closer to Christ, so our companionship with the saints joins us to Christ, from Whom as from its Fountain and Head issues every grace and the very life of the people of God. … For every genuine testimony of love shown by us to those in heaven, by its very nature tends toward and terminates in Christ”
“All forms of divination are to be rejected: recourse to Satan or demons, conjuring up the dead or other practices falsely supposed to "unveil" the future. … They contradict the honor, respect, and loving fear that we owe to God alone.”
“They do not cease to intercede with the Father for us, as they proffer the merits which they acquired on earth through the one mediator between God and men, Christ Jesus”