I never said Jesus misquoted anything. That is your accusation.
What statement in Isaiah are you speaking of?
Well, all you have to do is prove there was a so called 'Septuagint'. Which you can't because it doesn't exist.
Lees
And he came to Nazareth, where he had been brought up: and, as his custom was, he went into the synagogue on the sabbath day, and stood up for to read. And there was delivered unto him the book of the prophet Esaias. And when he had opened the book, he found the place where it was written.
"The Spirit of the Lord is upon me, because he hath anointed me to preach the gospel to the poor; he hath sent me to heal the brokenhearted, to preach deliverance to the captives, and recovering of sight to the blind, to set at liberty them that are bruised, To preach the acceptable year of the Lord"
And he closed the book, and he gave it again to the minister, and sat down. And the eyes of all them that were in the synagogue were fastened on him. And he began to say unto them, This day is this scripture fulfilled in your ears. And all bare him witness, and wondered at the gracious words which proceeded out of his mouth. And they said, Is not this Joseph's son?
Luke 4:16-22
So again, here is what Jesus spoke as he read from Isaiah 61
"The Spirit of the Lord is upon me, because he hath anointed me to preach the gospel to the poor; he hath sent me to heal the brokenhearted, to preach deliverance to the captives, and recovering of sight to the blind, to set at liberty them that are bruised, To preach the acceptable year of the Lord"
Notice the line "
recovery of sight to the blind"
Now here Isaiah 61 in the "imaginary" Septuagint/LXX
"The Spirit of the Lord is upon me, because he has anointed me; he has sent me to preach glad tidings to the poor, to heal the broken in heart, to proclaim liberty to the captives, and
recovery of sight to the blind to declare the acceptable year of the Lord"
Now turn to Isaiah 61 in YOUR bible and see if
"Recovery of sight to the blind" is found in Isaiah 61
Let me know when you find it