Let the girl to whom I say, 'Please lower your water jug so that I may drink,' and who responds, 'Drink, and I'll water your camels also'-let her be the one You have appointed for Your servant Isaac. By this I will know that You have shown kindness to my master."
2 Kings 20:8-11
Hezekiah had asked Isaiah, "What is the sign that the Lord will heal me and that I will go up to the Lord's temple on the third day?" Isaiah said, "This is the sign to you from the Lord that He will do what He has promised: Should the shadow go ahead 10 steps or go back 10 steps?" Then Hezekiah answered, "It's easy for the shadow to lengthen 10 steps. No, let the shadow go back 10 steps."read more.
So Isaiah the prophet called out to the Lord, and He brought the shadow back the 10 steps it had descended on Ahaz's stairway.
And Hezekiah had asked, "What is the sign that I will go up to the Lord's temple?"
Show me a sign of Your goodness; my enemies will see and be put to shame because You, Lord, have helped and comforted me.
"Ask for a sign from the Lord your God-from the depths of Sheol to the heights of heaven."
Then he said to Him, "If I have found favor in Your sight, give me a sign that You are speaking with me.
Then some of the scribes and Pharisees said to Him, "Teacher, we want to see a sign from You."
The Pharisees and Sadducees approached, and as a test, asked Him to show them a sign from heaven.
The Pharisees came out and began to argue with Him, demanding of Him a sign from heaven to test Him.
And others, as a test, were demanding of Him a sign from heaven.
So the Jews replied to Him, "What sign [of authority] will You show us for doing these things?"
"What sign then are You going to do so we may see and believe You?" they asked. "What are You going to perform?
Herod was very glad to see Jesus; for a long time he had wanted to see Him, because he had heard about Him and was hoping to see some miracle performed by Him.
But He answered them, "An evil and adulterous generation demands a sign, but no sign will be given to it except the sign of the prophet Jonah.
An evil and adulterous generation wants a sign, but no sign will be given to it except the sign of Jonah." Then He left them and went away.
Jesus told him, "Unless you [people] see signs and wonders, you will not believe."