Luke 11:29

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)