Mark 16:17
“And these signs will follow those who believe: In My name they will cast out demons; they will speak with new tongues.
Matthew 12:38-40 NASB
38 “Then some of the scribes and Pharisees said to Him, ‘Teacher, we want to see a sign from You.’
39 But He answered and said to them, ‘An evil and adulterous generation craves a sign; and so no sign will be given to it except the sign of Jonah the prophet;
40 for just as Jonah was in the stomach of the sea monster for three days and three nights, so will the Son of Man be in the heart of the earth for three days and three nights”
Luke 21:25-26 NKJV
25 “And there will be signs in the sun, in the moon, and in the stars; and on the earth distress of nations, with perplexity, the sea and the waves roaring;
26 men’s hearts failing them from fear and the expectation of those things which are coming on the earth for the powers of the heavens will be shaken.”