Genesis 15:8

And he said, "O Yahweh God, how shall I know [that] I will possess it?"

And Zechariah said to the angel, "By what will I know this? For I am an old man, and my wife is advanced {in years}!"

Then Gideon said to God, "In order to see that you will deliver Israel by my hand, just as you have said,

Hezekiah said to Isaiah, "What is the sign that Yahweh will heal me that I shall go up on the third day [to] the temple of Yahweh?"

Do a sign [that] benefits me, that those who hate me may see and be put to shame, because you, O Yahweh, have helped me and comforted me.

"Ask for a sign for yourself from Yahweh God; make [it] deep [as] Sheol or make [it] high as above."

And Abraham said to his servant, the oldest of his house, who had charge of all he had, "Please put your hand under my thigh

Behold, I am standing by the spring of water, and the daughters of the men of the city are going out to draw water.

And he said to him, "Please, if I have found favor in your eyes, {show me a sign} that you [are] speaking with me.

If they say to us: 'Wait until we reach you,' {then we will stand as we are} and not go up to them.

And Mary said to the angel, "How will this be, since I have not had sexual relations with a man?"

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