Luke 2:12
And this will be a sign to you: You will find a baby wrapped in swaddling cloths and lying in a manger."

Exodus 7:9
"When Pharaoh tells you, 'Perform a miracle,' you are to say to Aaron, 'Take your staff and throw it down before Pharaoh,' and it will become a serpent."

2 Kings 19:29
And this will be a sign to you, O Hezekiah: This year you will eat what grows on its own, and in the second year what springs from the same. But in the third year you will sow and reap; you will plant vineyards and eat their fruit.

Isaiah 7:10
Again the LORD spoke to Ahaz:

Isaiah 7:12
But Ahaz replied, "I will not ask; I will not test the LORD."

Isaiah 37:30
And this will be a sign to you, O Hezekiah: This year you will eat what grows on its own, and in the second year what springs from the same. But in the third year you will sow and reap; you will plant vineyards and eat their fruit.

Isaiah 38:7
This will be a sign to you from the LORD that He will do what He has promised:

Isaiah 38:8
I will make the sun's shadow that falls on the stairway of Ahaz go ten steps backward." So the shadow cast by the sun went back the ten steps it had descended.

Isaiah 55:13
Instead of the thornbush, a cypress will grow, and instead of the brier, a myrtle will spring up; they will make a name for the LORD as an everlasting sign, never to be destroyed."

Jeremiah 44:29
This will be a sign to you, declares the LORD, that I will punish you in this place, so you may know that My threats of harm against you will surely stand.