Wisdom 18:6

6 That night was made known beforehand to our fathers, so that they might rejoice in sure knowledge of the oaths in which they trusted.

Wisdom 18:6 In-Context

4 For their enemies deserved to be deprived of light and imprisoned in darkness, those who had kept thy sons imprisoned, through whom the imperishable light of the law was to be given to the world.
5 When they had resolved to kill the babes of thy holy ones, and one child had been exposed and rescued, thou didst in punishment take away a multitude of their children; and thou didst destroy them all together by a mighty flood.
6 That night was made known beforehand to our fathers, so that they might rejoice in sure knowledge of the oaths in which they trusted.
7 The deliverance of the righteous and the destruction of their enemies were expected by thy people.
8 For by the same means by which thou didst punish our enemies thou didst call us to thyself and glorify us.
Revised Standard Version of the Bible, copyright 1952 [2nd edition, 1971] by the Division of Christian Education of the National Council of the Churches of Christ in the United States of America. Used by permission. All rights reserved.