When he was about to enter Egypt, he said to Sarai his wife, “I know that you are a woman beautiful in appearance, and when the Egyptians see you, they will say, ‘This is his wife.’ Then they will kill me, but they will let you live. Say you are my sister, that it may go well with me because of you, and that my life may be spared for your sake.” When Abram entered Egypt, the Egyptians saw that the woman was very beautiful. And when the princes of Pharaoh saw her, they praised her to Pharaoh. And the woman was taken into Pharaoh's house. ...
(Genesis 12:11-19) ESV 

When the men of the place asked him about his wife, he said, “She is my sister,” for he feared to say, “My wife,” thinking, “lest the men of the place should kill me because of Rebekah,” because she was attractive in appearance. When he had been there a long time, Abimelech king of the Philistines looked out of a window and saw Isaac laughing with Rebekah his wife. So Abimelech called Isaac and said, “Behold, she is your wife. How then could you say, ‘She is my sister’?” Isaac said to him, “Because I thought, ‘Lest I die because of her.’”
(Genesis 26:7-9) ESV 

Jacob answered and said to Laban, “Because I was afraid, for I thought that you would take your daughters from me by force.
(Genesis 31:31) ESV 

However, the people who dwell in the land are strong, and the cities are fortified and very large. And besides, we saw the descendants of Anak there.
(Numbers 13:28) ESV 

These five kings fled and hid themselves in the cave at Makkedah.
(Joshua 10:16) ESV 

All the men of Israel, when they saw the man, fled from him and were much afraid.
(1 Samuel 17:24) ESV 

The wicked flee when no one pursues, but the righteous are bold as a lion.
(Proverbs 28:1) ESV 

And he said to them, “Why are you afraid, O you of little faith?” Then he rose and rebuked the winds and the sea, and there was a great calm.
(Matthew 8:26) ESV 

But all this has taken place that the Scriptures of the prophets might be fulfilled.” Then all the disciples left him and fled.
(Matthew 26:56) ESV 

Then they seized him and led him away, bringing him into the high priest's house, and Peter was following at a distance. And when they had kindled a fire in the middle of the courtyard and sat down together, Peter sat down among them. Then a servant girl, seeing him as he sat in the light and looking closely at him, said, “This man also was with him.” But he denied it, saying, “Woman, I do not know him.” And a little later someone else saw him and said, “You also are one of them.” But Peter said, “Man, I am not.” ....
(Luke 22:54-60) ESV 

When they had rowed about three or four miles, they saw Jesus walking on the sea and coming near the boat, and they were frightened.
(John 6:19) ESV 

At my first defense no one came to stand by me, but all deserted me. May it not be charged against them!
(2 Timothy 4:16) ESV 

But as for the cowardly, the faithless, the detestable, as for murderers, the sexually immoral, sorcerers, idolaters, and all liars, their portion will be in the lake that burns with fire and sulfur, which is the second death.
(Revelation 21:8) ESV