1 Corinthians 2:7-8

2:7 Instead we speak the wisdom of God, hidden in a mystery, that God determined before the ages for our glory. 2:8 None of the rulers of this age understood it. If they had known it, they would not have crucified the Lord of glory.

1 Corinthians 10:4

10:4 and all drank the same spiritual drink. For they were all drinking from the spiritual rock that followed them, and the rock was Christ.