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.
BBE - But this saying was not clear to them and its sense was kept secret from them so that they were not able to see it: and they had fear of questioning him about it.
WEB - But they didn't understand this saying. It was concealed from them, that they should not perceive it, and they were afraid to ask him about this saying.
YLT - And they were not knowing this saying, and it was veiled from them, that they might not perceive it, and they were afraid to ask him about this saying.