at.
1 Corinthians 15:32 If after the manner of men I have fought with beasts at Ephesus, what advantages it me, if the dead rise not? let us eat and drink...
Pentecost.
Exodus 23:16 And the feast of harvest, the first fruits of your labors, which you have sown in the field: and the feast of ingathering...
Leviticus 23:15-21 And you shall count to you from the morrow after the sabbath, from the day that you brought the sheaf of the wave offering...
Acts 2:1 And when the day of Pentecost was fully come, they were all with one accord in one place.