a sign

Isaiah 37:30
And this will be a sign to you, O Hezekiah: This year you will eat what grows on its own, and in the second year what springs from the same. But in the third year you will sow and reap; you will plant vineyards and eat their fruit.

Isaiah 38:7, 8, 22
This will be a sign to you from the LORD that He will do what He has promised: . . .

Judges 6:36-40
Then Gideon said to God, "If You will deliver Israel by my hand, as You have said, . . .

2 Kings 20:8-11
Now Hezekiah had asked Isaiah, "What is the sign that the LORD will heal me and that I will go up to the house of the LORD on the third day?" . . .

Jeremiah 19:1, 10
This is what the LORD says: "Go, buy a clay jar from a potter. Take some of the elders of the people and leaders of the priests, . . .

Jeremiah 51:63, 64
When you finish reading this scroll, tie a stone to it and cast it into the Euphrates. . . .

Matthew 12:38-40
Then some of the scribes and Pharisees said to Him, "Teacher, we want to see a sign from You." . . .

Matthew 16:1-4
Then the Pharisees and Sadducees came and tested Jesus by asking Him to show them a sign from heaven. . . .

ask it either in the depth.