this shall be a sign
1 Samuel 10:7
And let it be, when these signs are come unto thee, that thou do as occasion serve thee; for God is with thee.
Genesis 24:14
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 7:11
And thou shalt hear what they say; and afterward shall thine hands be strengthened to go down unto the host. Then went he down with Phurah his servant unto the outside of the armed men that were in the host.
Isaiah 7:11-14
11
Ask thee a sign of the LORD thy God; ask it either in the depth, or in the height above.
12
But Ahaz said, I will not ask, neither will I tempt the LORD.
13
And he said, Hear ye now, O house of David; Is it a small thing for you to weary men, but will ye weary my God also?
14
Therefore the Lord himself shall give you a sign; Behold, a virgin shall conceive, and bear a son, and shall call his name Immanuel.