1 Corinthians 16:8

But I will remain at Ephesus until the Pentecost;

Acts 2:1

And, when the day of Pentecost was being fulfilled they were all together in one place;

Acts 18:19

And they came down to Ephesus, and he left them there; but he himself, entering into the synagogue, reasoned with the Jews.

1 Corinthians 15:32

If in human fashion I fought with wild beasts at Ephesus, what is the profit to me? If the dead rise not; "Let us eat and drink; for to-morrow we die."

Treasury of Scripture Knowledge

Summary

But I will tarry at Ephesus until Pentecost.

Pentecost

Bible References

At

1 Corinthians 15:32
If in human fashion I fought with wild beasts at Ephesus, what is the profit to me? If the dead rise not; "Let us eat and drink; for to-morrow we die."

Pentecost

Acts 2:1
And, when the day of Pentecost was being fulfilled they were all together in one place;