Isa 7:10 Moreover the LORD spake again unto Ahaz, saying,
Isa 7:11 Ask thee a sign of the LORD thy God; ask it either in the depth, or in the height above.
Speaking through Isaiah, the LORD had promised to deliver Judah if Ahaz trusted in Him. Now he gives Ahaz an open door: ask for a sign to prove me and I will give it to you. This is the way the old testament Jews sought for proof.
1 Cor 1:22 For the Jews require a sign, and the Greeks seek after wisdom:
There should not be a need for a sign, but because of Ahaz' unbelief, God was willing to give him a sign.
They Jewish leaders asked for signs from Jesus too.
Mat 12:38 Then certain of the scribes and of the Pharisees answered, saying, Master, we would see a sign from thee.
Mat 12:39 But he answered and said unto them, An evil and adulterous generation seeketh after a sign;...
Mark 8:11 And the Pharisees came forth, and began to question with him, seeking of him a sign from heaven, tempting him.
Mark 8:12 And he sighed deeply in his spirit, and saith, Why doth this generation seek after a sign? verily I say unto you, There shall no sign be given unto this generation.
Isa 7:12 But Ahaz said, I will not ask, neither will I tempt the LORD.
Oh how spiritual this sounds, but is disobeying God a spiritual thing? What a hypocrite; he never intended to obey God.
Isa 29:13 Wherefore the Lord said, Forasmuch as this people draw near me with their mouth, and with their lips do honour me, but have removed their heart far from me, and their fear toward me is taught by the precept of men:
Isa 29:14 Therefore, behold, I will proceed to do a marvellous work among this people, even a marvellous work and a wonder: for the wisdom of their wise men shall perish, and the understanding of their prudent men shall be hid.
So many we witness to, pretend to want to know answers about God, but in truth they are just playing a game. They have already made up their mind, not believing or even blaming God, instead of coming to Him and obeying Him. God gave His Son, to redeem us from death and hell; yet many smugly refuse this, thinking themselves as clever, while trusting in lesser gods.
Rom 1:21 Because that, when they knew God, they glorified him not as God, neither were thankful; but became vain in their imaginations, and their foolish heart was darkened.
Rom 1:22 Professing themselves to be wise, they became fools,
It is never clever or wise to disobey God. Hear him, study his word, pray and obey your God. Do not be as Ahaz, refusing His offer of deliverance. Ahaz was an idolater.