Acts 2:1-13

And when the day of Pentecost was come, they were all with one accord in one place.

1 Corinthians 15:20

But now is Christ risen from the dead, the first-fruit of them that slept.

James 1:18

Of his own will begat he us by the word of truth, that we might be a kind of first fruits of his creatures.

Treasury of Scripture Knowledge

Summary

Also in the day of the firstfruits, when ye bring a new meat offering unto the LORD, after your weeks be out, ye shall have an holy convocation; ye shall do no servile work:

Bible References

In the day

Acts 2:1
And when the day of Pentecost was come, they were all with one accord in one place.
1 Corinthians 15:20
But now is Christ risen from the dead, the first-fruit of them that slept.
James 1:18
Of his own will begat he us by the word of truth, that we might be a kind of first fruits of his creatures.