John Gills Exposition of the Bible Commentary - John 6:42
And they said, is not this Jesus the son of Joseph ?.... From murmuring they go to mocking and scoffing at his parentage and descent, and object this to his coming down from heaven; and intend by it to upbraid him with the meanness of his birth, being the son of Joseph, a poor carpenter; and suggest, that it was great arrogance in him to claim an heavenly original, and to ascribe such things to himself, that he was the bread of God, and the bread of life, and came from heaven: whose... read more
William Barclay's Daily Study Bible - John 6:41-51
6:41-51a So the Jews kept murmuring about him, because he said: "I am the bread which came down from heaven." They kept saying: "Is this not Jesus, the son of Joseph, whose father and mother we know? How can he now say: 'I have come down from heaven'?" Jesus answered: "Stop murmuring to each other. No one can come to me except the Father who sent me draws him; and I will raise him up on the last day. It stands written in the prophets: 'And all will be taught by God.' Everyone who has listened... read more