Is there a scriptural basis for this? Asking a dead person to pray for you is a different thing from asking a living person to pray for you. There are scriptural examples of asking a living person to pray for you; but none that I know of for asking a dead person to pray for you. Also, when Catholics pray to saints, they don’t just ask them to “pray” for them; they appeal directly for their intercession; as shown in this quote form the opening message to the Catechism:
At the conclusion of this document presenting the Catechism of the Catholic Church, I beseech the Blessed Virgin Mary, Mother of the Incarnate Word and Mother of the Church, to support with her powerful intercession the catechetical work of the entire Church on every level, at this time when she is called to a new effort of evangelization. …
Given 11 October 1992, the thirtieth anniversary of the opening of the Second Vatican Ecumenical Council, in the fourteenth year of my Pontificate.
Pope John Paul II
whereas the Bible says that there is only one intercessor between God and man, and that is Jesus Christ (1 Timothy 2:5).
Hi zerinus, you state “whereas the Bible says that there is only one intercessor between God and man, and that is Jesus Christ (1 Timothy 2:5).” The following references are taken from two Catholic sources and two Protestant sources on 1 Tim 2:5
1 Tim 2:5
5 For there is one God. There is also one mediator between God and the human race, Christ Jesus, himself human,
NAB
1 Tim 2:5-6
5 For there is one God, and one mediator of God and men, the man Christ Jesus:
Douay Rheims
1 Tim 2:5-6
5 For there is one God, and one mediator between God and men, the man Christ Jesus;
KJV
1 Tim 2:5-6
5 For there is one God, and one mediator also between God and men, the man Christ Jesus,
NASB
Also some more context on 1 Tim 2:5-6 an excerpt from the
Haydocks Catholic Bible Commentary.
Ver. 5-6. One mediator of God and men, the man Christ Jesus: who gave himself a redemption for all. Take all these words together, and we may easily understand in what sense the apostle calls our Saviour Christ, the one or only mediator; that is, he is the only mediator, who at the same time is our Redeemer; the only mediator who could mediate betwixt God, the person offended by sin, and men the offenders; the only mediator who reconciled God to mankind by his incarnation and death, by the infinite price of his blood, by his own merits, independently of the merits of any other. All Catholics allow that the dignity and office of mediator in this sense belongs only to our Redeemer, Jesus Christ, the Son of God, made man to save us. The sense then of this place is, that as there is but one God, who created all, so there is but one mediator, who redeemed all. But yet the name of mediator is not so appropriated to Christ, but that in an inferior and different sense the Angels and saints in heaven, and even men on earth, who pray to God for the salvation of others, may be called mediators, intercessors, or advocates; and we may apply ourselves to them to pray, intercede, and mediate for us, without any injury to Christ, since we acknowledge that all their intercession and mediation is always grounded on the merits of Christ, our Redeemer.
I think this may answer the question a little more clearly. Peace