《北史·列传·卷七十七》
隋文帝做丞相时，曾经在夜间召见他，询问天时与人事，庾季才说 ：天道精深细微，难以详察。
及隋文帝为丞相，尝夜召问天时人事，季才曰： 天道精微，难可悉察。
When Emperor Wen of Sui was a chancellor, he once summoned him at night to ask about the weather and human affairs. Yu Jicai said, "The way of heaven is profound and subtle, and it is difficult to examine in detail."