Bible Verses about “signs”

“¶ And God said, Let there be lights in the firmament of the heaven to divide the day from the night; and let them be for signs, and for seasons, and for days, and years:”

“‹A wicked and adulterous generation seeketh after a sign; and there shall no sign be given unto it, but the sign of the prophet Jonas.› And he left them, and departed.”

“Then said Jesus unto him, ‹Except ye see signs and wonders, ye will not believe.›”