Ver. 29-32. See Poole on "Matthew 12:38", and following verses to Matthew 12:42. Matthew saith, they were the Pharisees that came to him, desiring to see a sign from heaven: they did the same again, Matthew 16:1. Christ was very ready to work miracles to encourage and confirm his hearers faith, but not to satisfy unbelievers curiosity. Instead therefore of showing them signs from heaven, he denounces the just judgment of God against them, for their not believing in him. See further the notes upon the aforementioned parallel texts.
Related Commentaries of Luke 11:29
Luke 11:29
29 And when the people were gathered thick together, he began to say,This is an evil generation: they seek a sign; and there shall no sign be given it, but the sign of Jonas the prophet.