Luke 24:37

But terrified and affrighted, they thought they saw a spirit.

Matthew 14:26-27

And when the disciples saw him walking on the sea, they were greatly agitated, saying, It is his apparition. And they cried out with terror.

Mark 6:49-50

But when they saw him walking upon the sea, they thought it was an apparition, and screamed out:

Luke 16:30

But he said, Ah no, father Abraham! but if one came to them from the dead, they will repent.

Acts 12:15

But they said, Thou art raving. But she confidently persisted that it was so. Then they said, It is his angel.

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 he said, Ah no, father Abraham! but if one came to them from the dead, they will repent.
Matthew 14:26
And when the disciples saw him walking on the sea, they were greatly agitated, saying, It is his apparition. And they cried out with terror.
Mark 6:49
But when they saw him walking upon the sea, they thought it was an apparition, and screamed out:
Acts 12:15
But they said, Thou art raving. But she confidently persisted that it was so. Then they said, It is his angel.