12 He sighed deeply and said, “Why does this generation ask for a sign? Truly I tell you, no sign will be given to it.”

Read Mark 8:12 Using Other Translations

And he sighed deeply in his spirit, and saith,Why doth this generation seek after a sign? verily I say unto you, There shall no sign be given unto this generation.
And he sighed deeply in his spirit and said, "Why does this generation seek a sign? Truly, I say to you, no sign will be given to this generation."
When he heard this, he sighed deeply in his spirit and said, “Why do these people keep demanding a miraculous sign? I tell you the truth, I will not give this generation any such sign.”