18 Then answered the Jews, and said to him, What sign showest thou to us, seeing that thou doest these things?
John 2:18 Cross References - Webster
Matthew 12:38-42
38 Then certain of the scribes and of the Pharisees answered, saying, Master, we would see a sign from thee.
39 But he answered and said to them, An evil and adulterous generation seeketh for a sign, and there shall no sign be given to it, but the sign of the prophet Jonah.
40 For as Jonah was three days and three nights in the whale's belly: so shall the Son of man be three days and three nights in the heart of the earth.
41 The men of Nineveh shall rise in judgment with this generation, and shall condemn it: because they repented at the preaching of Jonah; and behold, a greater than Jonah is here.
42 The queen of the south shall rise up in the judgment with this generation, and shall condemn it: for she came from the uttermost parts of the earth to hear the wisdom of Solomon; and behold, a greater than Solomon is here.
Matthew 16:1-4
1 The Pharisees also and the Sadducees came, and, tempting, desired him that he would show them a sign from heaven.
2 He answered and said to them, When it is evening, ye say, It will be fair weather: for the sky is red.
3 And in the morning, It will be foul weather to-day: for the sky is red and lowering. O ye hypocrites, ye can discern the face of the sky; but can ye not discern the signs of the times?
4 A wicked and adulterous generation seeketh for a sign; and there shall no sign been to it, but the sign of the prophet Jonah. And he left them, and departed.
Matthew 21:23
23 And when he had come into the temple, the chief priests and the elders of the people came to him as he was teaching, and said, By what authority doest thou these things; and who gave thee this authority?
Mark 8:11
11 And the Pharisees came forth, and began to question with him, seeking from him a sign from heaven, tempting him.
Mark 11:27-28
27 And they come again to Jerusalem: and as he was walking in the temple, there come to him the chief priests, and the scribes, and the elders,
28 And say to him, By what authority doest thou these things? and who gave thee this authority to do these things?
29 And when the people were assembled in crowds, he began to say, This is an evil generation: they seek a sign; and there shall no sign be given to it, but the sign of Jonah the prophet.
Luke 20:1-2
1 And it came to pass, that on one of those days, as he was teaching the people in the temple, and preaching the gospel, the chief priests and the scribes came upon him, with the elders,
2 And spoke to him, saying, Tell us, By what authority doest thou these things? or who is he that gave thee this authority?
John 1:25
25 And they asked him, and said to him, Why baptizest thou then, if thou art not that Christ, nor Elijah, neither that prophet?
John 6:30
30 They said therefore to him, What sign showest thou then, that we may see, and believe thee? what dost thou work?
Acts 4:7
7 And when they had set them in the midst, they asked, By what power, or by what name have ye done this?
Acts 5:28
28 Saying, Did we not strictly command you, that ye should not teach in this name? and behold, ye have filled Jerusalem with your doctrine, and intend to bring this man's blood upon us.