Question: How can you defend the authenticity of the doxology of the Lord’s Prayer in Matthew’s Gospel when it is missing from Luke’s account?

Having these two “versions” only proves that Jesus taught on prayer on more than one occasion and to different audiences. Matthew’s version was publicly spoken to multitudes from a mountain before Jesus called the apostles (Matthew 5:1; 10:1). Luke’s version was spoken after these events and in response to one of the disciples asking for a private lesson in prayer (Luke 6:13-16; 11:1). Ultimately, the prayer was never intended as an unalterable formula, but as a pattern. Hence, the diversity of expression.

Answered by Christian McShaffrey