I have just submitted my PhD thesis. The thesis dealt with an early (4th century?) Coptic manuscript. Here is a literal translation of the Lord's Prayer from the manuscript. Note that the long form of the Lord's Prayer (for thine is the kingdom, glory, and power) developed later as a befitting conclusion to the prayer and was not a part of the original text of Matthew's Gospel.
As for you, therefore, it is in this way that you should ask:
Our Father in heaven, may your name be hallowed. May your kingdom come to us. That which you will, may it be; as it is in heaven, may it be done upon the earth. Give us our bread of tomorrow today. Forgive our debts in the way that we, for our part, are forgiving the ones indebted to us. Do not bring us into temptation, but deliver us [lit., you certainly shall deliver us] from evil.