KJV: And Simon answering said unto him, Master, we have toiled all the night, and have taken nothing: nevertheless at thy word I will let down the net.
NASB: Simon answered and said, "Master, we worked hard all night and caught nothing, but I will do as You say and let down the nets."
KJV: But they understood not this saying, and it was hid from them, that they perceived it not: and they feared to ask him of that saying.
NASB: But they did not understand this statement, and it was concealed from them so that they would not perceive it; and they were afraid to ask Him about this statement.