Daniel 1:3-4; Daniel 12:8-10

3 And the king spake unto Ashpenaz the master of his eunuchs, that he should bring certain of the children of Israel, and of the king's seed, and of the princes;

4 Children in whom was no blemish, but well favoured, and skilful in all wisdom, and cunning in knowledge, and understanding science, and such as had ability in them to stand in the king's palace, and whom they might teach the learning and the tongue of the Chaldeans.

8 And I heard, but I understood not: then said I, O my Lord, what shall be the end of these things?

9 And he said, Go thy way, Daniel: for the words are closed up and sealed till the time of the end.

10 Many shall be purified, and made white, and tried; but the wicked shall do wickedly: and none of the wicked shall understand; but the wise shall understand.