[Ali Imran]

Q7:157
Sahih International
Those who follow the Messenger, the unlettered prophet, whom they find written in what they have of the Torah and the Gospel, who enjoins upon them what is right and forbids them what is wrong and makes lawful for them the good things and prohibits for them the evil and relieves them of their burden and the shackles which were upon them. So they who have believed in him, honored him, supported him and followed the light which was sent down with him - it is those who will be the successful.

So can we confirm that the Injil was relayed by Jesus and was written down and read by the christians back then

I showed you two verses of the Gospels in the NT. One from Mark, and another from Matthew.

Which one is the correct one?