Luke 24:37

In their terror and alarm they thought they saw a spirit,

Matthew 14:26-27

But, when they saw him walking on the water, they were terrified. "It is a ghost," they exclaimed, and cried out for fear.

Mark 6:49-50

But, when they saw him walking on the water, they thought it was a ghost, and cried out;

Luke 16:30

'But, Father Abraham,' he urged, 'if some one from the dead were to go to them, they would repent.'

Acts 12:15

"You are mad!" they exclaimed. But, when she persisted that it was so, they said: "It must be his spirit!"

Treasury of Scripture Knowledge

Summary

But they were terrified and affrighted, and supposed that they had seen a spirit.

Bible References

General references

Luke 16:30
'But, Father Abraham,' he urged, 'if some one from the dead were to go to them, they would repent.'
Matthew 14:26
But, when they saw him walking on the water, they were terrified. "It is a ghost," they exclaimed, and cried out for fear.
Mark 6:49
But, when they saw him walking on the water, they thought it was a ghost, and cried out;
Acts 12:15
"You are mad!" they exclaimed. But, when she persisted that it was so, they said: "It must be his spirit!"