So Abraham instructed the chief servant of his household, who managed all he owned, “Place your hand under my thigh, and I will have you swear by the LORD, the God of heaven and the God of earth, that you will not take a wife for my son from the daughters of the Canaanites among whom I am dwelling, but will go to my country and my kindred to take a wife for my son Isaac.” ... Here I am, standing beside the spring, and the daughters of the townspeople are coming out to draw water. Now may it happen that the girl to whom I say, ‘Please let down your jar that I may drink,’ and who responds, ‘Drink, and I will water your camels as well’—let her be the one You have appointed for Your servant Isaac. By this I will know that You have shown kindness to my master.”
Gideon answered, “If I have found favor in Your sight, give me a sign that it is You speaking with me. Please do not depart from this place until I return to You. Let me bring my offering and set it before You.” And the LORD said, “I will stay until you return.” So Gideon went in and prepared a young goat and unleavened bread and an ephah of flour. He placed the meat in a basket and the broth in a pot and brought them out to present to Him under the oak. And the angel of God said to him, “Take the meat and the unleavened bread, lay them on this rock, and pour out the broth.” And Gideon did so. Then the angel of the LORD extended the tip of the staff that was in his hand and touched the meat and the unleavened bread. And fire flared from the rock and consumed the meat and the unleavened bread. Then the angel of the LORD vanished from his sight. When Gideon realized that it was the angel of the LORD, he said, “Oh no, Lord GOD! I have seen the angel of the LORD face to face!” But the LORD said to him, “Peace be with you. Do not be afraid, for you will not die.” So Gideon built an altar to the LORD there and called it The LORD Is Peace. To this day it stands in Ophrah of the Abiezrites. ... Then Gideon said to God, “If You are going to save Israel by my hand, as You have said, then behold, I will place a fleece of wool on the threshing floor. If there is dew only on the fleece and all the ground is dry, then I will know that You are going to save Israel by my hand, as You have said.” And that is what happened. When Gideon arose the next morning, he squeezed the fleece and wrung out the dew—a bowlful of water. Then Gideon said to God, “Do not be angry with me; let me speak one more time. Please allow me one more test with the fleece. This time let it be dry, and the ground covered with dew.” And that night God did so. Only the fleece was dry, and dew covered the ground.
If they say, ‘Wait until we come to you,’ then we will stay where we are and will not go up to them. But if they say, ‘Come on up,’ then we will go up, because this will be our sign that the LORD has delivered them into our hands.”
“How can I be sure of this?” Zechariah asked the angel. “I am an old man, and my wife is well along in years.” ... “How can this be,” Mary asked the angel, “since I am a virgin?”