John Gill Commentary Luke 11:29

"And when the multitudes were gathering together unto him, he began to say, This generation is an evil generation: it seeketh after a sign; and there shall no sign be given to it but the sign of Jonah." — Luke 11:29 (ASV)

And when the people were gathered thick together
Upon this woman's lifting up her voice, and saying the things she did; or rather to see what sign he would give, which some had desired (Luke 11:16)

he began to say, this is an evil generation .
The Alexandrian copy, two copies of Beza's, and the Vulgate Latin, and Arabic versions read, "this generation is an evil generation"; and also it was an "adulterous one", as is added in (Matthew 12:39)

they seek a sign ;
for they had asked one of him, (Luke 11:16)

and there shall no sign be given it, but the sign of Jonas the
prophet; one like unto it: (See Gill on Matthew 12:39)