Luke 1:18And Zacharias said unto the angel, Whereby shall I know this? for I am an old man, and my wife well stricken in years.
Judges 6:36-40And Gideon said unto God, If thou wilt save Israel by mine hand, as thou hast said, Behold, I will put a fleece of wool in the floor; and if the dew be on the fleece only, and it be dry upon all the earth beside, then shall I know that thou wilt save Israel by mine hand, as thou hast said. And it was so: for he rose up early on the morrow, and thrust the fleece together, and wringed the dew out of the fleece, a bowl full of water. And Gideon said unto God, Let not thine anger be hot against me, and I will speak but this once: let me prove, I pray thee, but this once with the fleece; let it now be dry only upon the fleece, and upon all the ground let there be dew. And God did so that night: for it was dry upon the fleece only, and there was dew on all the ground.
2 Kings 20:8And Hezekiah said unto Isaiah, What shall be the sign that the LORD will heal me, and that I shall go up into the house of the LORD the third day?
Psalms 86:17Shew me a token for good; that they which hate me may see it, and be ashamed: because thou, LORD, hast holpen me, and comforted me.
Isaiah 7:11Ask thee a sign of the LORD thy God; ask it either in the depth, or in the height above.
Genesis 24:2-4And Abraham said unto his eldest servant of his house, that ruled over all that he had, Put, I pray thee, thy hand under my thigh: And I will make thee swear by the LORD, the God of heaven, and the God of the earth, that thou shalt not take a wife unto my son of the daughters of the Canaanites, among whom I dwell: But thou shalt go unto my country, and to my kindred, and take a wife unto my son Isaac.
Genesis 24:13-14Behold, I stand here by the well of water; and the daughters of the men of the city come out to draw water: And let it come to pass, that the damsel to whom I shall say, Let down thy pitcher, I pray thee, that I may drink; and she shall say, Drink, and I will give thy camels drink also: let the same be she that thou hast appointed for thy servant Isaac; and thereby shall I know that thou hast shewed kindness unto my master.
Judges 6:17-24And he said unto him, If now I have found grace in thy sight, then shew me a sign that thou talkest with me. Depart not hence, I pray thee, until I come unto thee, and bring forth my present, and set it before thee. And he said, I will tarry until thou come again. And Gideon went in, and made ready a kid, and unleavened cakes of an ephah of flour: the flesh he put in a basket, and he put the broth in a pot, and brought it out unto him under the oak, and presented it. And the angel of God said unto him, Take the flesh and the unleavened cakes, and lay them upon this rock, and pour out the broth. And he did so. Then the angel of the LORD put forth the end of the staff that was in his hand, and touched the flesh and the unleavened cakes; and there rose up fire out of the rock, and consumed the flesh and the unleavened cakes. Then the angel of the LORD departed out of his sight. And when Gideon perceived that he was an angel of the LORD, Gideon said, Alas, O LORD God! for because I have seen an angel of the LORD face to face. And the LORD said unto him, Peace be unto thee; fear not: thou shalt not die. Then Gideon built an altar there unto the LORD, and called it Jehovahshalom: unto this day it is yet in Ophrah of the Abiezrites.
1 Samuel 14:9-10If they say thus unto us, Tarry until we come to you; then we will stand still in our place, and will not go up unto them. But if they say thus, Come up unto us; then we will go up: for the LORD hath delivered them into our hand: and this shall be a sign unto us.
Luke 1:34Then said Mary unto the angel, How shall this be, seeing I know not a man?