Genesis 15:8

Treasury of Scripture Knowledge

And he said, Lord GOD, whereby shall I know that I shall inherit it?

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

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.

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