I was trying to discover where in the gospels the Hail Mary prayer was found. At least not in the gospels that I am familiar with.
I have to admit that I don’t think it can be found. Maybe supported, but not found word for word as the Lords Prayer is found.
The Hail Mary prayer was given to us from Gabriel the angel of God, and Elizabeth who was under the inspiration of the Holy Spirit when she Spoke to Mary in the Sacred Scriptures.
Luke 1; 28, and coming to her, (Gabriel) He said, “Hail Mary full of Grace, the Lord is with you”
Luke 1:41 When Elizabeth heard Mary’s greetiong, the infant leaped in her wombed, and Elizabeth, FILLED WITH THE HOLY SPIRIT, CRIED OUT IN A LOUD VOICE AND SAID, "Most blessed are you among woman, and blessed is the fruit of thy womb.
This devotional prayer we get directly from heaven, The body of Christ on earth responds to the angel and the holy spirit by praying,
Holy Mary , Mother of God, pray for our sinners now and at the hour of our death amen.
Now this response to heaven from the body of Christ on earth, his bride the Catholic Church. Does not come on the seen until 325 a.d. after the council of Ephesus.
in brief: the church council of Ephesus, was dealing with many heretical teachings at this time. Jesus divinity came in question, When the council ended, The consensus was that Jesus is fully human, fully divine. Thus the people of Ephesus, waited to hear the councils decision, when the news touched their ears. They all exclaimed and in procession, "holy Mary mother of God, Pray for us sinners now and at the hour of our death.
You see, the children of God, ask the blessed virgin Mary to pray for us, as she prayed for Jesus during the hour of his death.
The gospel of John 19:26,27
I hope this helps

May you overcome with the peace of Jesus Christ our Lord and Savior