Acts 2:1
And when the day of Pentecost was fully come, they were all with one accord in one place.
Nave's Topical Index—AKJV

Acts 20:16
For Paul had determined to sail by Ephesus, because he would not spend the time in Asia: for he hurried, if it were possible for him, to be at Jerusalem the day of Pentecost.
Nave's Topical Index—AKJV

1 Corinthians 16:8
But I will tarry at Ephesus until Pentecost.
Nave's Topical Index—AKJV