But they did not understand this statement. It was veiled from them so that they could not comprehend it, and they were afraid to ask Him about it.
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.
ASV
But they understood not this saying, and it was concealed from them, that they should not perceive it; and they were afraid to ask him about this saying.