THE LORD'S PRAYER IS NOT EXACTLY THE SAME AS RECORDED BY MATTHEW AND LUKE! HOW COME? (SEE MATTHEW 6:9-13 AND LUKE 11:2-4)
First of all we need to know that the Lord taught this prayer twice, on two different occasions. Matthew records the Lord's Prayer as given on the Sermon on the Mount, while Luke records the Lord's Prayer when the Master was asked to teach the disciples how to pray, much after the Sermon on the Mount message was given.
Even if the Lord repeated the prayer, word-to-word, the recordings of both Matthew and Luke need not have to be exactly the same. Most part of the Bible was written by thought inspiration and not dictation. You will notice the same thoughts being mentioned by both Matthew and Luke even in the Lord's Prayer, though sometimes the words are not identical. The order is the same in both. Let us read, side by side, both the recordings, and you will see the difference is not much at all.
Our Father which art in heaven, Hallowed be thy name. Thy kingdom come. (Matthew 6:9, 10)
Our Father which art in heaven, Hallowed be thy name. Thy kingdom come. (Luke 11:2)
Thy will be done in earth, as it is in heaven. (Matthew 6:10)
Thy will be done, as in heaven, so in earth. (Luke 11:2)
Give us this day our daily bread. (Matthew 6:11)
Give us day by day our daily bread. (Luke 11:3)
And forgive us our debts, as we forgive our debtors. (Matthew 6:12)
And forgive us our sins; for we also forgive every one that is indebted to us. (Luke 11:4)
And lead us not into temptation, but deliver us from evil. (Matthew 6:13)
And lead us not into temptation; but deliver us from evil. (Luke 11:4)
For thine is the kingdom, and the power, and the glory, for ever. Amen. (Matthew 6:13)
Matthew has the last part, which Luke does not have. But otherwise, the whole thought is same in both the recordings, the words are nearly the same, except a little alteration as it was recorded by thought inspiration and not the dictation method.
BUT ONE MIGHT SAY: All that is fine, but what about the last part missing in Luke's recording? That is no problem either. You will notice this pattern in many places. The most precious text is John 3:16. Interestingly only the Gospel of John records this and no other Gospel!
When talking about the Lord's Supper, the three Gospels talk about the bread and the wine (grape juice), but only John's Gospel talks about the feet washing ordinance.
It should not be surprising that what one writer missed out, the Holy Spirit made the other to record it. Whether a passage is mentioned just once or more than once does not matter. Jesus said:
Man shall not live by bread alone, but by every word that proceedeth out of the mouth of God. (Matthew 4:4)
"Every word" in the Bible is important even if it is not repeated elsewhere.
The prayer of Matthew is more complete as it contains all what Luke has recorded, and a little more.