'Frightening' in the Bible

As the sun began to set, Abram was overcome with deep sleep, and suddenly a frightening and terrifying darkness descended on him.

Then the woman went to tell her husband. She said, "A man of God appeared to me. He looked like what an angel of God would look like very frightening. I didn't ask him where he had come from and he didn't tell me his name.

But Jesus told them, "What's frightening you? And why are you doubting?