Please show me from the NT ]someone praying directly
]to a saint in heaven specifically for something.
Why do you assume that everything that a Christian believes is only to be found in the bible?
As for me, even if the teaching is found only implicitly in scripture, I will look to the teachings and the Traditions of the Church through out history.
I know that you are probably thinking " yes, but you are listening to the traditions of ‘men’., but I honestly believe that the Church that Christ established is protected from teaching error.
When Jesus promised the Advocate,(the Holy Spirit), to the Apostles to guide them to all truth, and to bring to remembrance of all that He had spoken, that wasn’t a short lived promise which would end once the New Testament was written, I believe that it was a gift given to the Church, so it could teach the truth until the end of time.
The Church has proven itself over the ages, countering the many heresies that have cropped up bringing to question the teachings of the church. How did the church counter the heretics who proved their teachings from scripture alone? By Scripture, the Traditions, and the teaching of the Magisterium of the Church. At one point Arianism had engulfed 2/3 of all the bishops, but the promise of the Holy Spirit, guided the church out of this heresy.
Well enough with my pontificating which I doubt you will ever agree with, and onto the writings of the Church fathers to which I look to see if Christians should pray to saints or not, and if it were a practice of Christians trough out the history of the Church.
Origen
But not the high priest [Christ] alone prays for those who pray sincerely, but also the angels… as also the souls of the saints who have already fallen asleep (On Prayer II [A.D. 233]).
Pectorius
Aschandius, my father, dearly beloved of my heart, with my sweet mother and my brethren, remember your Pectorius in the peace of the Fish [Christ] (Epitaph [A.D. 250]).
Cyprian
Let us remember one another in concord and unanimity. Let us on both sides always pray for one another. Let us relieve burdens and afflictions by mutual love, that if 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 (Letters 56[60]:5 [A.D. 252]).
Anonymous
Atticus, sleep in peace, secure in your safety, and pray anxiously for our sins (funerary inscription near St. Sabina’s in Rome [A.D. 300]).
Anonymous
Pray for your parents, Matronata Matrona. She lived one year, fifty-two days (ibid.).
Cyril of Jerusalem
Then [during the Eucharistic prayer] we make mention also of those who have already fallen asleep: first, the patriarchs, prophets, apostles, and martyrs, that through their prayers and supplications God would receive our petition… (Catechetical Lectures 23:9 [A.D. 350]).
Anonymous
Mother of God, [listen to] my petitions; do not disregard us in adversity, but rescue us from danger (Rylands Papyrus 3 [A.D. 350]).
Hilary of Poitiers
To those who would fain to stand, neither the guardianship of saints nor the defenses of angels are wanting (Commentary on the Psalms 124:5:6 [A.D. 365]).
Ephraem of Syria
Remember me, you heirs of God, you brethren of Christ; supplicate the Savior earnestly for me, that I may be freed through Christ from him that fights against me day by day (De Timore, Anim. in fin. [A.D. 370]).
Liturgy of St. Basil
By the command of your only-begotten Son we communicate with the memory of your saints . . . by whose prayers and supplications have mercy upon us all, and deliver us for the sake of your holy name (Liturgy of St. Basil [A.D. 373]).