}
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The answer is from the bible
1john 1: 3
That which we have seen and heard declare we unto you, that ye also may have fellowship with us: and truly our fellowship is with the Father, and with his Son Jesus Christ.
Matthew was not there it was only Peter James and John. Why did Matthew Wright this then?
Luke 1 : 1 and 2
Forasmuch as many have taken in hand to set forth in order a declaration of those things which are most surely believed among us,
Even as they delivered them unto us, which from the beginning were eyewitnesses, and ministers of the word;
It was written by Luke he was not there but he wrote it.
Let see Luke 9 from 28 to 35
And it came to pass about an eight days after these sayings, he took Peter and John and James, and went up into a mountain to pray.And as he prayed, the fashion of his countenance was altered, and his raiment was white and glistering.And, behold, there talked with him two men, which were Moses and Elias:Who appeared in glory, and spake of his decease which he should accomplish at Jerusalem.But Peter and they that were with him were heavy with sleep: and when they were awake, they saw his glory, and the two men that stood with him.And it came to pass, as they departed from him, Peter said unto Jesus, Master, it is good for us to be here: and let us make three tabernacles; one for thee, and one for Moses, and one for Elias: not knowing what he said.While he thus spake, there came a cloud, and overshadowed them: and they feared as they entered into the cloud.And there came a voice out of the cloud, saying, This is my beloved Son: hear him.
It was Luke who wrote he was not there even wrote exactly what Matthew wrote
Another point made by bro ell he said it not by force you must be there it can be, earing or by seeing this can help someone to write
The bible passage that written in the book of Luke 9 was to pass the message for the people of Philadelphia.
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https://3speak.tv/watch?v=fatimajunio/skcqouod